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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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Path to Powershell.exe (v 2.0)
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I believe it's in C:\Windows\System32\WindowsPowershell\v1.0\. In order to confuse the innocent, MS kept it in a directory labeled "v1.0". Running this on Windows 7 and checking the version number via $Host.Version (Determine installed PowerShell version) show...
How to revert a folder to a particular commit by creating a patch
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answered May 25 '11 at 3:10
jamessanjamessan
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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 extract the decision rules from scikit-learn decision-tree?
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143
I believe that this answer is more correct than the other answers here:
from sklearn.tree impor...
How do you set EditText to only accept numeric values in Android?
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edited Jul 17 at 2:33
Josh Correia
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How to dynamically load a Python class
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edited Sep 30 '15 at 12:22
Archit Jain
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Remove first 4 characters of a string with PHP
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423
You could use the substr function to return a substring starting from the 5th character:
$str =...
Compare JavaScript Array of Objects to Get Min / Max
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53
The fastest way, in this case, is looping through all elements, and compare it to the highest/lo...