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Pandas aggregate count distinct
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How about either of:
>>> df
date duration user_id
0 2013-04-01 30 0001
1 2013-04-01 15 0001
2 2013-04-01 20 0002
3 2013-04-02 15 0002
4 2013-04-02 30 0002
>>> df.groupby("date").agg({"duration": np.sum, "user_id": ...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...ed by both the C and C++ standards. For example, the C99 standard ( §6.2.5/9 ) states
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Download a single folder or directory from a GitHub repo
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Is there an eval() function in Java? [duplicate]
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In Javascript, how to conditionally add a member to an object?
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How can I selectively escape percent (%) in Python strings?
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answered May 21 '12 at 0:03
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Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
...ferent sizes, a pattern came up. Invariably, transposing a matrix of size 2^n is slower than transposing one of size 2^n+1 . For small values of n , the difference is not major.
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How to check if mod_rewrite is enabled in php?
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If you're using mod_php, you can use apache_get_modules(). This will return an array of all ena...
Warning on “diff.renamelimit variable” when doing git push
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Showing data values on stacked bar chart in ggplot2
I'd like to show data values on stacked bar chart in ggplot2. Here is my attempted code
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