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1
Enable element-wise comparison operations in DataMatrix objects
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2010-09-29T00:45:31Z
2014-02-11T20:40:01Z
2011-02-19T23:13:48Z
MEMBER
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re: pystatsmodels e-mail hi everyone, just getting started with pandas and i was wondering if someone could help me out. do pandas.DataMatrix objects support per item comparison operations? i have a two data matrices, and i want to do something like this: div[div > 0.5 \* price] = 0 this would work if div and pri...
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reindex_like function
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2010-09-29T00:50:13Z
2014-09-15T17:20:09Z
2010-12-17T02:57:33Z
MEMBER
null
In Series, DataMatrix, WidePanel, etc.
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3
Binary operations on int DataMatrix
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2010-09-29T00:50:52Z
2014-09-15T17:20:09Z
2011-01-01T23:50:12Z
MEMBER
null
Reported by kwgoodman, Jun 12, 2010 When adding two int DataMatrix's a ValueError is raised when matrix.py attempt to fill missing values with NaN: > > dma1 = pandas.DataMatrix([[1, 2], [3, 4]], ['a', 'b'], ['c', 'd']) > > dma2 = pandas.DataMatrix([[1, 2], [3, 4]], ['b', 'a'], ['d', 'c']) > > dma1 + dma2 > > <snip> >...
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4
Plot keyword arguments are unused in DataFrame plot()
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2010-09-29T00:51:27Z
2014-02-11T20:40:01Z
2010-12-11T06:14:32Z
MEMBER
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Reported by twhitcomb, Jul 27, 2010 What steps will reproduce the problem? 1. Import pandas 2. Create a sample DataFrame 3. Plot the DataFrame using a linewidth keyword argument. What is the expected output? What do you see instead? I expect to see the linewidth keyword argument passed through to the plotting routine....
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Python 2.7 testing
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2010-09-29T00:57:00Z
2014-02-11T20:40:01Z
2010-12-17T02:46:34Z
MEMBER
null
Test pandas on Python 2.7
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6
Fix argument inconsistency in pandas.stats.moments exp-weighted functions
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2010-09-29T05:30:56Z
2014-02-11T20:40:01Z
2010-12-11T06:05:26Z
MEMBER
null
Should have min_periods arguments like the other rolling moment functions
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7
DataMatrix constructor ignores dtype argument if data is a DataMatrix
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2010-09-29T15:41:55Z
2014-02-11T20:40:01Z
2010-12-11T06:12:00Z
NONE
null
``` >>> a = DataMatrix([[1.0,2.0,3.0],[4.0,5.0,6.0]], range(2), range(3)) >>> b = DataMatrix(a, dtype=int) >>> b.values.dtype dtype('float64') ``` Not sure if this was a design decision or not, but it seems like the dtype of b.values should be int.
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8
np.fix doesn't work
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2010-09-29T19:45:47Z
2014-02-11T20:40:01Z
2011-06-23T04:50:05Z
NONE
null
``` In [28]: np.fix(Series([1,2,3], range(3))) --------------------------------------------------------------------------- Exception Traceback (most recent call last) C:\alei1\basic_mktneutral\<ipython console> in <module>() C:\Python26\lib\site-packages\numpy\lib\ufunclike.pyc in fix(...
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9
Fix pandas.io.parsers.parseExcel to be more robust / have correct handling of Excel dates
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2010-09-30T22:29:36Z
2011-05-18T02:43:33Z
2011-05-18T02:43:33Z
MEMBER
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10
Improvements to pandas.io.pytables / unit testing
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2010-09-30T22:33:14Z
2014-07-01T02:55:23Z
2011-06-23T19:38:51Z
MEMBER
null
Need to incorporate the selection of ranges of data and write unit tests
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11
Rename {Series, DataFrame, WidePanel}.fill() to something else
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2010-09-30T22:34:26Z
2011-02-19T23:46:00Z
2011-02-19T23:46:00Z
MEMBER
null
Will need to give users advance warning of API breakage
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12
DataFrame and DataMatrix column ordering
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2010-10-03T17:20:41Z
2010-12-11T22:53:14Z
2010-12-11T22:53:14Z
NONE
null
First, thank you for the pandas package -- it's incredibly useful and well done. I know that one of the fundamental concepts behind the data structures is that column ordering doesn't matter. And, as long as one only uses pandas' data access/manipulation functions (eg, sum(), ewma(), etc.), this works fine. But ofte...
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13
Add PyTable Paths to HDFStore
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2010-10-07T23:42:34Z
2012-12-13T01:37:53Z
2012-12-12T21:35:57Z
NONE
null
Hello, I not sure if this was the best way to suggest improvements, but here I go anyway :) I really like the easy of the HDFStore (and the entire project for that matter), but I wanted the ability to store and retrieve DataFrames in Groups below the root. .i.e ``` h5 = HDFStore('test.h5') h5['/groups/below/theroot'...
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14
Make more flexible arithmetic functions in DataFrame/DataMatrix
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2010-10-11T03:19:39Z
2011-02-19T16:13:00Z
2011-02-19T16:13:00Z
MEMBER
null
For example: ``` df.add(series, axis=0) df.add(series, axis='index') df.add(series, axis='columns') ``` Etc., might be useful in certain cases
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15
.apply() API consistency fix
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2010-10-12T16:10:48Z
2010-12-11T06:19:58Z
2010-12-11T06:19:58Z
MEMBER
null
DataFrame.apply, Series.applymap, Series.map sort of come across as inconsistent. ``` def f(x): return x.apply(lambda y: 2*y) def g(x): return x.applymap(lambda y: 2*y) a = TimeSeries([1,2],[1,2]) b = DataMatrix({'a':a}) f(b) g(b) f(a) g(a) ```
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358,947
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16
Outlier detection in pandas.stats.moments functions
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2010-10-12T16:13:04Z
2011-06-23T04:46:14Z
2011-06-23T04:46:14Z
MEMBER
null
Floating point error can result in incorrect output in the rolling_\* functions (need unit tests)
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17
Better support for mixed-type data
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2010-10-12T16:13:55Z
2011-07-08T22:15:57Z
2011-07-08T22:15:57Z
MEMBER
null
Across DataFrame and Wide/LongPanel classes
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18
weights option may not be working in pandas.stats.ols.OLS
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2010-10-12T16:15:10Z
2011-12-31T16:53:33Z
2011-09-25T05:17:23Z
MEMBER
null
Need to investigate (user notified)
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19
parseCSV on result of toCSV does not preserve index type
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2010-10-22T17:59:31Z
2011-01-11T03:37:14Z
2011-01-11T03:37:14Z
MEMBER
null
From Google Code: http://code.google.com/p/pandas/issues/detail?id=14 First of all, thanks very much for this very nice project. I find it extremely useful. I ran into a very minor issue: What steps will reproduce the problem? 1. Create a DataFrame with date objects in the index 2. Write to csv using toCSV method 3...
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20
Install 0.2beta fail on Debian Lenny / python2.5
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2010-11-19T14:50:11Z
2010-12-17T02:45:20Z
2010-12-17T02:45:20Z
NONE
null
Using a stock debian lenny box with: - numpy-1.3.0 built from source - scipy 0.8.0 built from source - matplotlib-1.0.0 built from source - pandas-0.2beta (note: no problems with latest github pull) # Errors: Install 0.2beta mpenning@Bucksnort:~/src/pandas-0.2beta$ sudo python setup.py install running install runnin...
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21
Consistent column ordering between DataFrame and DataMatrix
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2010-11-19T18:41:36Z
2010-11-19T18:42:08Z
2010-11-19T18:42:08Z
MEMBER
null
To allow the classes to have more nearly identical behavior
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22
numpy.dtype size changed runtime warning on XP
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2010-12-14T16:50:11Z
2010-12-19T05:55:29Z
2010-12-15T04:07:42Z
NONE
null
I've installed numpy from numpy-1.5.1-win32-superpack-python2.6.exe and pandas from pandas-0.2.win32-py2.6.exe. When I import \* from pandas I get the following warnings: Warning (from warnings module): File "C:\Program Files\Python26\lib\site-packages\pandas\core\index.py", line 7 from pandas.lib.tseries impo...
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23
numpy traceback during easy_install on Debian Lenny
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2010-12-22T10:37:40Z
2011-01-01T23:16:26Z
2011-01-01T23:16:26Z
NONE
null
I'm not sure whether this is due to a problem with my local version of numpy or something else (in perhaps pandas?)... I did not see this previously (same numpy install and other dependencies) when I installed from Github trunk (sometime around November 15, 2010)... ``` [mpenning@Bucksnort ~]$ uname -a Linux Bucksnort...
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Install problems
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2010-12-24T07:27:52Z
2010-12-24T21:29:45Z
2010-12-24T16:27:12Z
NONE
null
pypi install of pandas still isn't working on 2.7, even with all dependencies Python 2.7.1 (r271:86832, Nov 27 2010, 18:30:46) [MSC v.1500 32 bit (Intel)] on win32 Type "help", "copyright", "credits" or "license" for more information. > > > import pandas > > > Traceback (most recent call last): > > > File "<stdin>"...
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Souce compile errors
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2010-12-24T07:32:39Z
2010-12-24T21:28:59Z
2010-12-24T21:28:59Z
NONE
null
Old bug opened on google code showed that workaround for the pypi install failures should be to download latest source and compile as such: python setup.py build --compiler=mingw32 python setup.py install tseries.c has two errors stopping compilation pandas\lib\src\tseries.c: In function '__Pyx_c_absf': pandas\lib\sr...
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26
dtype mismatch when calling .median()
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2011-01-03T17:15:19Z
2011-01-03T23:23:47Z
2011-01-03T23:23:47Z
NONE
null
Using python 2.5.2, pandas 0.3 and numpy 1.5.1 on a debian lenny box... mean() works, but not median() ``` >>> df1['b'].truncate(before=dt.date(2010,12,2),after=dt.date(2010,12,4)) 2010-12-02 6 2010-12-03 7 2010-12-04 8 >>> df1['b'].truncate(before=dt.date(2010,12,2),after=dt.date(2010,12,4)).median() Traceba...
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Incorrect T-Stats in FamaMacBeth.py
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2011-01-03T23:29:47Z
2011-02-20T00:53:44Z
2011-02-20T00:53:44Z
CONTRIBUTOR
null
Small bug in the FamaMacBeth class at lines 105-106-- the printed form of the regression results gives the STD twice, rather than the t-stat: <code> std_beta = self._results['std_beta'][i] t_stat = self._results['std_beta'][i] </code> Last one should be t_stat instead of std_beta the second time.
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28
what is the easiest way to plot a timeseries and dataframe?
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2011-01-11T04:14:15Z
2011-01-29T19:13:49Z
2011-01-29T19:13:49Z
NONE
null
it looks like ts.plot and df.plot is not implemented yet. I watched Wes's PyCon 2010 video where he use some functions fplot (presumably it is defined in the pycon_demo.py that was run at the beginning of the demo). pandas is a great package. Hope it will be kept active and keep expanding. Great work. Thanks.
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https://api.github.com/repos/pandas-dev/pandas/issues/29
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519,475
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29
.asfreq() dies when the index values have tzinfo associated with them
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2011-01-11T12:15:39Z
2011-06-23T04:47:01Z
2011-06-23T04:47:01Z
NONE
null
``` >>> # dataframe is indexed at a second granularity, using eastern time >>> dataframe <class 'pandas.core.frame.DataFrame'> Index: 24676 entries , 2010-10-04 00:03:49-04:00 to 2010-10-04 23:59:55-04:00 etf 10897 non-null values etfvol ...
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https://api.github.com/repos/pandas-dev/pandas/issues/30
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519,516
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30
resource hog -> .asfreq(DateOffset(seconds=1),method='pad')
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2011-01-11T12:31:34Z
2011-06-14T14:17:06Z
2011-06-14T14:17:06Z
NONE
null
``` >>> df2['a'] 2010-12-01 00:00:00 1 2010-12-02 00:00:00 2 2010-12-03 00:00:00 3 2010-12-04 00:00:00 4 >>> df2['a'].asfreq(pn.DateOffset(seconds=1),method='pad') ## NOTE: The above one-liner runs for over 20 minutes on a 2Ghz Xeon, python 2.5.2, numpy 1.5.1, ## & pandas head from 2011-01-05. It al...
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https://api.github.com/repos/pandas-dev/pandas/issues/31
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31
Is there a single pdf instead of html documentation/help file?
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2011-01-13T04:05:11Z
2011-02-20T00:07:53Z
2011-02-20T00:07:53Z
NONE
null
This may not be the best place to post this question b/c it is not an "issue", just a question that I don't know where else I can post it to. I am just wondering whether there is a single pdf help or documentation file, instead of html help pages on the sourceforge website. Also, I am wondering whether we have a faq or...
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https://api.github.com/repos/pandas-dev/pandas/issues/32
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32
Does pandas support piecewise/multi-period regression?
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2011-01-18T20:28:41Z
2011-01-20T17:42:12Z
2011-01-20T17:42:12Z
NONE
null
Hi, I need to do piecewise or multi-period regression where the breakpoint is determined automatically by the algorithm itself. Does pandas support that? Thanks a lot. -alex
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https://api.github.com/repos/pandas-dev/pandas/issues/33
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544,195
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33
NumPy >= 1.4.0 NaN-handling issues
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1
2011-01-22T20:36:36Z
2011-02-20T00:50:55Z
2011-02-20T00:50:55Z
MEMBER
null
There are a few potential NaN-casting problems floating around the codebase, e.g.: ``` df1 = pandas.DataFrame({'x':[5]}) df2 = pandas.DataFrame({'x':[1]}) df1.combineAdd(df2) ```
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https://api.github.com/repos/pandas-dev/pandas/issues/34
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34
reindex(method="backfill") and periods within the last date
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2011-01-24T20:15:05Z
2011-02-20T00:52:36Z
2011-02-20T00:52:36Z
NONE
null
I have a DataFrame with 1 minute timestamps, pw. I have a monthly average of the values: ma_pw=pw.groupby(BMonthEnd(+1).rollforward).aggregate(np.mean) When I do a reindex to push that average back into all of the periods for the month, the last day's values are NaN. Here's my reindex attempt: reindexed = ma_pw.rei...
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https://api.github.com/repos/pandas-dev/pandas/issues/35
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35
Added hist method and added auto_x argument to plot method.
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2011-02-22T08:07:35Z
2011-02-27T05:17:56Z
2011-02-25T01:41:56Z
NONE
null
I have added hist method to frame.py and series.py, and added auto_x argument to plot method, which can be useful for the cases where the index does not consist of numeric values. -Joon
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36
Install problems on Windows 7
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5
2011-02-25T19:07:03Z
2013-09-17T12:20:45Z
2011-03-02T12:24:08Z
NONE
null
I'm on a new computer with Windows 7. I've installed the 32 bit versions of python-2.7.1 and all subsequent requirements. pandas-0.3.0.win32-py2.7.exe does not complete. It just stops and windows claims it is not responding. The same phenomenon happened installing tables-2.2.1.win32-py2.7.exe. I'm assuming that py...
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https://api.github.com/repos/pandas-dev/pandas/issues/37
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37
added describe and scoreatpercentile in frame.py
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2011-03-06T01:35:53Z
2014-07-03T19:26:14Z
2011-03-18T20:00:26Z
NONE
null
Added two methods in frame.py: describe, which returns a DataFrame with summary statistics of each columns of the original DataFrame (with index=columns), and scoreatpercentile, which calculate the score at the given percentile. When I play around with a dataset I use this describe thing a lot so I thought it would be...
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38
changed _pfixed in common.py to add a leading space to positive numbers
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2011-03-22T19:27:42Z
2011-03-22T23:47:23Z
2011-03-22T20:01:36Z
NONE
null
So the results of DataFrame.toString() without any float_format argument is aligned around the period. I think it looks much better. :)
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736,058
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39
Adding variable description in DataFrame
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2011-04-06T00:15:26Z
2014-03-09T15:18:34Z
2014-03-09T15:18:34Z
NONE
null
Hi, I think it would be great if DataFrame is able to store additional property (list of strings) which contains the description for each variable (column). And then it can be shown by themselves with variable names as well as in the output of pandas.DataFrame.info(). I think with this DataFrame will be pretty much se...
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https://api.github.com/repos/pandas-dev/pandas/issues/40
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40
Create generic moving window function
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1
2011-05-01T17:31:45Z
2011-06-28T03:09:55Z
2011-06-28T03:09:55Z
MEMBER
null
Probably no way to make more efficient than naive Python loop, but at least more convenient
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835,731
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41
Join methods for WidePanel
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2011-05-01T17:32:55Z
2012-01-05T19:04:25Z
2012-01-05T19:04:25Z
MEMBER
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e.g. def create_panels_join(a, b): """ return a join of the 2 panels """ d = dict([ (i,(a[i].T.join(v.T)).T) for i, v in b.iteritems() ]) return p.WidePanel.fromDict(d) # this is a 'more' correct version, but have to assure that a[i] is not None def create_panels_join(a, b): """ return a ...
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835,736
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42
Slice DataMatrix-- get a view
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2011-05-01T17:33:45Z
2011-05-30T22:59:55Z
2011-05-30T22:59:55Z
MEMBER
null
add copy keyword to .xs() method. Won't work with DataFrame, should raise Exception
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835,771
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43
HDFStore testing and improvements
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2011-05-01T17:58:10Z
2011-06-23T04:47:33Z
2011-06-23T04:47:33Z
MEMBER
null
Per many requests...just a place holder to remind me to do it
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44
All days instead of business days?
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4
2011-05-06T10:38:14Z
2011-05-16T12:03:37Z
2011-05-06T19:13:40Z
NONE
null
Hi, I am very new to github and miss a discussion board for pandas. Not sure if issues is the right place for my question, so feel free to delete it, but please point to the right place for questions. The question: I need to aggregate hourly time series to the daily scale, that would include all days, 7 per week. Cu...
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45
Importing data using HDFStore with pre-epoch dates; "ValueError: timestamp out of range for platform localtime()/gmtime() function"
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2
2011-05-20T22:13:31Z
2011-06-23T04:17:27Z
2011-06-23T04:17:27Z
NONE
null
I have data with a DataFrame that goes back to 1949. I imported it from a csv into a hdf5 using HDFStore. That went fine, but when reading from the HDFStore to get a DF back, I get the below stack trace. When looking at the data in the store I see that the index has negative values for preepoch times... ValueError: t...
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979,782
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46
Configure pandas like pyzmq so checking in .c files is not necessary
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1
2011-05-31T16:51:22Z
2011-06-28T00:41:31Z
2011-06-28T00:41:31Z
MEMBER
null
No reason to be checking in the C files and diffs
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47
Time zone handling in DateRange, etc. using pytz
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1
2011-06-03T08:53:52Z
2011-06-14T14:43:51Z
2011-06-14T14:43:51Z
MEMBER
null
Working on this at the moment, but still more to do
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48
"Proper" boolean array with NA handling in DataMatrix
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2011-06-03T09:08:28Z
2011-06-14T14:06:41Z
2011-06-14T14:06:41Z
MEMBER
null
Currently booleans are getting casted to floats in some circumstances in order to handle NAs. Need to devise a workable scheme for boolean data possibly containing NAs.
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49
Consistent column ordering in mixed-type DataMatrix
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2011-06-03T09:10:29Z
2011-06-14T14:06:14Z
2011-06-14T14:06:14Z
MEMBER
null
As floats and non-floats are currently segregated, column ordering not reliable. Thus, behavior between DataFrame and DataMatrix is not identical
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50
Better implementation of rolling_max and min
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2011-06-03T10:50:07Z
2012-07-12T16:51:03Z
2012-07-12T16:51:03Z
MEMBER
null
Currently using skiplist, unnecessary
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1,091,992
MDU6SXNzdWUxMDkxOTky
51
examples not running, error in documentation
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6
2011-06-21T14:09:06Z
2011-06-21T16:34:40Z
2011-06-21T14:38:23Z
NONE
null
Both examples do not run. In finance.py, on line 83: ``` filledRatio = ibm / ibmMonthly.reindex(ibm.index, fillMethod='pad') ``` should be: ``` filledRatio = ibm / ibmMonthly.reindex(ibm.index, method='pad') ``` As reindex is defined in core/series.py as ``` def reindex(self, index=None, method=None): ``` Thi...
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1,092,649
MDU6SXNzdWUxMDkyNjQ5
52
Improve fancy indexing when selecting cross-sections
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2011-06-21T15:49:54Z
2011-06-23T04:16:33Z
2011-06-23T04:16:33Z
MEMBER
null
Something like ``` df.ix[0, ['C', 'B', A']] ``` is currently performing a wasteful reindex(columns=['C', 'B', A']), need to have some better way to infer the "right" order to perform the operations in
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1,102,365
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53
Optimized DataFrame.append for block structure if possible
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2011-06-23T04:45:51Z
2011-06-23T19:39:40Z
2011-06-23T19:39:40Z
MEMBER
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1,123,834
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54
fillna bug on ordered string data
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2011-06-27T17:53:51Z
2011-06-27T23:06:24Z
2011-06-27T23:06:24Z
MEMBER
null
OK ``` x = Series([NaN,1.,NaN,3.,NaN],['a','b','c','d','e'], dtype=object) x.fillna(method='pad') ``` Not OK ``` x = Series([NaN,1.,NaN,3.,NaN],['z','a','b','c','d'], dtype=object) x.fillna(method='pad') ```
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https://api.github.com/repos/pandas-dev/pandas/issues/55
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https://github.com/pandas-dev/pandas/pull/55
1,134,205
MDExOlB1bGxSZXF1ZXN0MjAxOTY3
55
Minor change to CleanCommand so build works with stdeb
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2011-06-29T00:59:24Z
2011-06-29T02:07:07Z
2011-06-29T02:06:48Z
CONTRIBUTOR
null
Hi Wes, i've been following your pandas work for a while, and regularly install it on my ubuntu based systems. I generally use the stdeb (https://github.com/astraw/stdeb) package for creating .deb files from python packages. Unfortunately, some of your recent changes in setup.py in pandas caused a problem with buildi...
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https://api.github.com/repos/pandas-dev/pandas/issues/56
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1,169,618
MDU6SXNzdWUxMTY5NjE4
56
Some reverse binary operations fail with dtype=object
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1
2011-07-05T19:50:00Z
2011-07-08T21:07:28Z
2011-07-08T21:07:28Z
MEMBER
null
See example ``` In [12]: arr = Series(np.random.randn(10), index=np.arange(10), dtype=object) In [13]: arr Out[13]: 0 -0.475934738891 1 0.602096986911 2 0.731158853064 3 -0.268872970066 4 0.607786684074 5 -0.0200444918205 6 1.93289485517 7 1.14860246486 8 -0.138246858663 9 0.38273631747...
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1,224,282
MDU6SXNzdWUxMjI0Mjgy
57
fillna bug
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1
2011-07-14T16:28:06Z
2011-07-14T16:46:35Z
2011-07-14T16:46:35Z
NONE
null
ser=Series([np.nan,1,2],index=range(3)) ser.fillna(method='backfill') GIVES ValueError: unknown dtype code in numpy.pxd (0)
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1,228,406
MDU6SXNzdWUxMjI4NDA2
58
setup.py
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2011-07-15T04:51:09Z
2011-07-15T06:54:06Z
2011-07-15T06:54:06Z
NONE
null
sudo python setup.py -v build # fails on Mac OS 10.6 or something can't convert the .pyx files to .c hard linking pandas/src/skiplist.pyx -> pandas-0.4.0.dev20110715_027c90b/pandas/src 'pandas/src/sparse.c' not a regular file -- skipping hard linking pandas/src/sparse.pyx -> pandas-0.4.0.dev20110715_027c90b/panda...
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1,232,682
MDU6SXNzdWUxMjMyNjgy
59
Use Pdb.runcall() in debug()
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3
2011-07-15T21:18:40Z
2011-07-15T23:44:55Z
2011-07-15T23:44:55Z
CONTRIBUTOR
null
See attached patch.
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https://api.github.com/repos/pandas-dev/pandas/issues/60
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1,233,249
MDU6SXNzdWUxMjMzMjQ5
60
Easier subclassing
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20
2011-07-15T23:11:41Z
2014-07-30T01:12:20Z
2014-07-30T01:12:20Z
NONE
null
Hi, Currently, sub-classing pandas objects is not as easy as it could be. This is the result of many methods explicitly creating specific classes. E.g. the '_combine_const' method from 'matrix' explicitly returns a DataMatrix object: def _combine_const(self, other, func): if not self: return ...
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https://api.github.com/repos/pandas-dev/pandas/issues/61
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1,239,398
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61
DataFrame.__ne__ not implemented
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1
2011-07-18T02:15:11Z
2011-07-20T19:46:26Z
2011-07-20T19:46:25Z
MEMBER
null
See ``` dm = DataFrame({'col1':[1,2],'col2':[1,2]}) dm[dm!=0] = 5 ```
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62
Add na_omit options to aggregation functions
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1
2011-07-18T15:37:26Z
2011-10-02T02:56:19Z
2011-10-02T02:56:19Z
MEMBER
null
A la R's ``` mean(arr, na.rm=T) ```
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63
Unit testing / cleanup of pandas.io.sql
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2011-07-18T15:37:46Z
2012-04-12T03:42:31Z
2012-04-12T03:17:15Z
MEMBER
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1,242,434
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64
numpy.datetime64 type integration
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0
2011-07-18T15:39:18Z
2012-04-05T00:31:26Z
2012-04-05T00:31:26Z
MEMBER
null
Need to examine use cases and see how hard it will be to switch over
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1,242,459
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65
Add dot method to DataFrame
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2011-07-18T15:43:35Z
2011-11-10T04:08:23Z
2011-11-10T04:08:23Z
MEMBER
null
To enable easy matrix multiplication with DataFrame: ``` df.dot(series) ```
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66
Fancy indexing on single column of DataFrame
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2011-07-18T15:45:19Z
2011-07-30T18:02:16Z
2011-07-30T18:02:16Z
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Things like this does not work ``` df.ix[boolean_vec, 'B'] = val ```
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67
Reindexing Cython code cleanup
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2011-07-18T15:46:39Z
2011-10-02T03:26:44Z
2011-10-02T03:26:44Z
MEMBER
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reindex.pyx is a bit of a mess
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68
Import plyr-like functionality
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2011-07-18T15:47:17Z
2011-11-06T01:46:48Z
2011-11-06T01:46:48Z
MEMBER
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Want to be able to do things like: http://cran.r-project.org/web/packages/plyr/index.html
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69
Fancy indexing on WidePanel and n-dimensional version
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2011-07-18T15:48:30Z
2011-09-08T16:42:07Z
2011-09-08T16:42:07Z
MEMBER
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see indexing.py, `DataFrameIndexer`, need to make more generic for the n-dimensional case
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70
Implement DataFrame.insert method
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2011-07-18T15:49:35Z
2011-07-20T19:47:10Z
2011-07-20T19:47:04Z
MEMBER
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Want to be able to insert columns at specific locations, e.g. ``` df.insert(0, column, value) ```
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71
Enable DataFrame constructor to accept structured/record ndarray
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2011-07-18T15:50:10Z
2011-07-20T19:45:42Z
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72
Enable reindex methods to optionally not copy data when they can
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2011-07-18T15:52:21Z
2011-09-08T16:39:40Z
2011-09-08T16:39:40Z
MEMBER
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If no reshaping is required, reindex currently copies anyway (which is the generally desired behavior: favor immutability): ``` df.reindex(index) ``` but perhaps you could do: ``` df.reindex(index, force_copy=False) ``` if course if reshaping is required, a copy will be created anyway. Should think of a better keyw...
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73
Enable Series objects to optionally have a name associated with them
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2011-07-18T15:54:10Z
2011-10-14T22:18:03Z
2011-10-14T22:18:03Z
MEMBER
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This would be easy to do / unobtrusive: ``` >>> s = Series(values, index, name='foo') >>> s.name ```
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74
Test coverage for pandas.stats subpackage
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75
Heterogeneous type handling in LongPanel
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2011-07-18T16:02:37Z
2011-08-11T04:12:54Z
2011-08-11T04:12:54Z
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Now that WidePanel admits non-floating point data, need to_long to work and LongPanel needs an internal block structure
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76
Sparse cumsum functions do not work
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2011-07-18T21:00:39Z
2011-07-20T03:52:38Z
2011-07-20T03:52:38Z
MEMBER
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e.g. SparseSeries.cumsum
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77
Build error on OS X 10.7: tseries
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35
2011-07-21T19:32:25Z
2011-10-03T13:53:25Z
2011-10-02T02:55:40Z
NONE
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I'm trying to build pandas on OSX 10.7, but run into an error building tseries: building 'pandas._tseries' extension C compiler: llvm-gcc-4.2 -DNDEBUG -g -fwrapv -Os -Wall -Wstrict-prototypes -arch x86_64 -pipe creating build/temp.macosx-10.7-x86_64-2.7 creating build/temp.macosx-10.7-x86_64-2.7/pandas creating build...
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78
Create HierarchicalIndex object to implement multi-level indexing
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2011-07-24T20:08:48Z
2011-09-08T16:38:54Z
2011-09-08T16:38:54Z
MEMBER
null
Also provides a nice way to create pretty pivot tables / cross-tabulations
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79
groupby.pyx
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2011-07-26T01:42:29Z
2011-07-26T02:02:21Z
2011-07-26T02:00:58Z
NONE
null
Hi Wes, got an error when building " index = np.asarray(index) ## ^ /home/yinchun/diy/pyenv/invest/src/pandas/pandas/src/groupby.pyx:62:28: local variable 'index' referenced before assignment " could i just delete this line?? Thanks, Tim
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80
Some test data files don't get copied to site-packages
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2011-07-26T15:41:00Z
2013-12-04T00:40:19Z
2011-08-07T16:16:36Z
MEMBER
null
csv/h5/xls files in pandas/io/tests
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81
bug in DataFrame/DataMatrix toCSV method when index=False
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2011-07-27T23:02:15Z
2011-07-31T16:23:24Z
2011-07-31T16:23:24Z
CONTRIBUTOR
null
When index=False an extra column is added because the leading comma is never removed. ``` def toCSV(self, path, nanRep='', cols=None, header=True, index=True, mode='wb'): *<snip>* for idx in self.index: if index: f.write(str(idx)) for col in cols: *<snip>* ...
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82
ImportError: No module named tseries
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2011-07-28T15:04:34Z
2013-12-04T00:40:19Z
2011-07-28T15:20:01Z
NONE
null
Hi, I downloaded the 0.3.0 package from pypi, installed using "sudo python setup.py install". The install was OK, but in Python when doing "import pandas" I get the following error: "ImportError: No module named tseries" (full output from Ipython below). This was using Ubuntu 10.04 (32), Thanks. ## In [1]: import ...
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83
[suggestion] example for pandas.DataFrame.pivot
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2011-07-29T15:53:40Z
2011-07-30T16:58:47Z
2011-07-30T16:58:47Z
NONE
null
Please provide some documentation and examples for pandas.DataFrame.pivot, which is noted here: http://pandas.sourceforge.net/generated/pandas.DataFrame.pivot.html#pandas.DataFrame.pivot Thanks!
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1,311,144
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84
Create memory-efficient DateIndex
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2011-07-29T16:26:50Z
2012-04-05T00:31:20Z
2012-04-05T00:31:20Z
MEMBER
null
Need to use either numpy.datetime64 or scikits.timeseries.DateArray as the means of implementation
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85
Enable pandas.core.sparse objects to be stored in HDFStore
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2011-07-29T22:19:39Z
2016-10-12T23:02:34Z
2012-05-07T15:05:18Z
MEMBER
null
Currently SparseDataFrame and friends can't be stored in HDFStore
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86
Push some of Series.ix into Series.__getitem__/__setitem__
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2011-07-30T01:01:42Z
2012-01-13T21:17:59Z
2012-01-13T21:17:59Z
MEMBER
null
Should be able to do stuff like: ``` ts[date1:date2] ``` to mirror ts.ix[date1:date2]. Should respect integer labels while Series.ix will not
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87
[question] possible to use compound logic in indexing
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2011-08-01T20:13:57Z
2011-08-07T19:31:13Z
2011-08-07T19:31:13Z
NONE
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in your documentation, you have the following example: ``` >>> df[df['A'] > 0.5] A D N S 2009-05-29 00:00:00 0.979307 0.979307 4 5 2009-07-31 00:00:00 0.536261 nan 6 5 2009-09-30 00:00:0...
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88
Document panel {sum, mean, ...} methods
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2011-08-05T15:46:35Z
2011-09-08T16:38:37Z
2011-09-08T16:38:37Z
MEMBER
null
e.g. WidePanel.sum has no usage documentation
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89
Fix for issue #80
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2011-08-06T08:02:19Z
2014-07-17T17:26:50Z
2011-08-07T16:15:41Z
CONTRIBUTOR
null
Starting small... It looks like the .h5 files in pandas/io/tests were getting copied okay, but the xls and csv files weren't in the package-data, so I added them.
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90
build error on linux: common.pyx
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2011-08-07T02:54:27Z
2011-08-07T20:40:20Z
2011-08-07T05:01:23Z
NONE
null
I tried to build from head . I got the following error. My cython version is 0.12.1. Unfortunately I can't upgrade cython as I don't have root permission. cythoning pandas/src/tseries.pyx to pandas/src/tseries.c ## Error converting Pyrex file to C: ... result[idx] = i PyArray_ITER_NEXT(iter) ``` retu...
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1,361,586
MDU6SXNzdWUxMzYxNTg2
91
Change sum/mean/count/std/var/etc. to use bottleneck if available
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2011-08-07T19:42:03Z
2012-01-12T01:03:28Z
2012-01-12T01:03:28Z
MEMBER
null
bottleneck.{nan*} methods are much faster than the pure Python/NumPy versions inside DataFrame, for example.
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1,361,833
MDU6SXNzdWUxMzYxODMz
92
Enable DataFrame to be sorted by multiple columns
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4
2011-08-07T20:57:42Z
2017-03-15T18:46:35Z
2011-11-13T18:28:29Z
MEMBER
null
Code would look more or less like: ``` sorted_df = df.sort(['col1', 'col2']) ```
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1,361,845
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93
Improve Cython multi-groupby code to do aggregation without having to sort the data
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2011-08-07T21:01:30Z
2011-12-16T01:32:07Z
2011-12-16T01:32:07Z
MEMBER
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Currently doing a lexsort to put things in order-- likely less efficient than it could be
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1,361,862
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94
Make DataFrame toString formatting use precision set in numpy.set_printoptions
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2011-08-07T21:08:46Z
2011-09-08T16:41:34Z
2011-09-08T16:41:30Z
MEMBER
null
Currently the code involved with this is located in pandas/core/common.py. Shouldn't be very hard to do
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95
Implement GroupBy __len__ to return number of resulting groups
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2011-08-09T02:25:36Z
2011-08-19T20:11:26Z
2011-08-19T20:11:26Z
NONE
null
Right now there is no way (to my knowledge) to get the number of groups that the DataFrame.groupby() method creates. For example (using Pandas 0.4 dev): ``` from pandas import *; from numpy.random import randn data = { 'A': rand(4), 'B': rand(4), 'C': (0, 1, 1, 1)} df = DataFrame(data) grouping = df.groupby('C') len(...
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96
Write Cython function to determine sort order in hierarchical indexes
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2011-08-09T17:29:47Z
2011-09-05T20:28:06Z
2011-09-05T20:28:06Z
MEMBER
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1,374,309
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97
Problem with Series.plot
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2011-08-09T18:25:40Z
2011-08-09T18:32:55Z
2011-08-09T18:32:55Z
CONTRIBUTOR
null
The code snippet below raises an AssertionError from pandas because matplotlib tries to add a dimension to the index ndarray subclass. No big deal, since i can do pylab.plot(np.asarray(ts.index), np.asarray(ts.values) import pandas import datetime import numpy as np values = np.arange(5.) dates = [datetime.datetime(2...
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98
Calling xs on DataFrame with index but no columns raises Exception
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2011-08-09T20:53:42Z
2011-08-09T22:54:57Z
2011-08-09T22:54:57Z
MEMBER
null
example: ``` In [1]: df = DataFrame(index=['a', 'b', 'c']) In [2]: df.ix['a'] ERROR: An unexpected error occurred while tokenizing input The following traceback may be corrupted or invalid The error message is: ('EOF in multi-line statement', (2, 0)) ------------------------------------------------------------------...
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1,376,176
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99
Bring back .groups attribute for GroupBy
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3
2011-08-09T22:51:30Z
2011-08-19T21:07:24Z
2011-08-19T20:11:52Z
MEMBER
null
A bit more complicated now with possible multiple groupings, however.
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100
Remove AmbiguousIndexError in fancy indexing
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2011-08-10T00:51:55Z
2011-08-19T20:12:50Z
2011-08-19T20:12:50Z
MEMBER
null
.ix field should prefer labels over integers, while **getitem** should prefer integers
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