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How to sort a dataframe by multiple column(s)
... code:
R> dd[with(dd, order(-z, b)), ]
b x y z
4 Low C 9 2
2 Med D 3 1
1 Hi A 8 1
3 Hi A 9 1
Edit some 2+ years later: It was just asked how to do this by column index. The answer is to simply pass the desired sorting column(s) to the order() function:
R> dd[order(-dd[,4], dd[,1]), ...
gunicorn autoreload on source change
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edited Sep 2 at 5:30
Martlark
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answered...
Django: How to completely uninstall a Django app?
...ass():
print "deleting %s"%c # print(f"deleting {c}") # for Python 3.6+
c.delete()
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How to implement __iter__(self) for a container object (Python)
...n some_list.
def __iter__(self):
yield 5
yield from some_list
Pre-3.3, yield from didn't exist, so you would have to do:
def __iter__(self):
yield 5
for x in some_list:
yield x
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How to extract the decision rules from scikit-learn decision-tree?
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I believe that this answer is more correct than the other answers here:
from sklearn.tree impor...
string.ToLower() and string.ToLowerInvariant()
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edited May 23 '17 at 11:54
Community♦
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answered Nov 4 '13 at 22:05
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List all the modules that are part of a python package?
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edited Nov 10 '09 at 13:41
answered Nov 10 '09 at 12:58
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How to add a TextView to LinearLayout in Android
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edited Feb 22 '14 at 21:37
Lucas
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answered Jul ...