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Why does one hot encoding improve machine learning performance?
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List comprehension vs map
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$ python -mtimeit -s'xs=range(10)' 'map(hex, xs)'
100000 loops, best of 3: 4.86 usec per loop
$ python -mtimeit -s'xs=range(10)' '[hex(x) for x in xs]'
100000 loops, best of 3: 5.58 usec per loop
An example of how performance comparison gets completely reversed when map needs a lambda:
$ pytho...
Python 3: UnboundLocalError: local variable referenced before assignment [duplicate]
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Jakob BowyerJakob Bowyer
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What is sr-only in Bootstrap 3?
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8 revs, 6 users 73%anon
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How can I make pandas dataframe column headers all lowercase?
...x in data.columns]
example:
>>> data = pd.DataFrame({'A':range(3), 'B':range(3,0,-1), 'C':list('abc')})
>>> data
A B C
0 0 3 a
1 1 2 b
2 2 1 c
>>> data.columns = map(str.lower, data.columns)
>>> data
a b c
0 0 3 a
1 1 2 b
2 2 1 c
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surface plots in matplotlib
I have a list of 3-tuples representing a set of points in 3D space. I want to plot a surface that covers all these points.
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How to stop Eclipse formatter from placing all enums on one line
...icy to Wrap all elements, every element on a new line (...) so it now says 3 of 3 in the parenthesis.
Uncheck Force split, even if line shorter than maximum line width (...) so it now says 3 of 3 in the parenthesis.
Select the Constants treenode
Check Force split, even if line shorter than maximum l...
What is the difference between BIT and TINYINT in MySQL?
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answered Nov 14 '08 at 14:39
Robert GambleRobert Gamble
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Declaring variables inside or outside of a loop
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edited Aug 6 '17 at 13:35
answered Jan 10 '12 at 13:12
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