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How can I obtain the element-wise logical NOT of a pandas Series?
...: s = pd.Series([True, True, False, True])
In [8]: ~s
Out[8]:
0 False
1 False
2 True
3 False
dtype: bool
Using Python2.7, NumPy 1.8.0, Pandas 0.13.1:
In [119]: s = pd.Series([True, True, False, True]*10000)
In [10]: %timeit np.invert(s)
10000 loops, best of 3: 91.8 µs per loop
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Javascript roundoff number to nearest 0.5
...ng to screen resolution and for that i can only assign font size in pts to 1, 1.5 or 2 and onwards etc.
7 Answers
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How can I find the number of days between two Date objects in Ruby?
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How do you push a Git tag to a branch using a refspec?
I want to force push, for example, my tag 1.0.0 to my remote master branch.
4 Answers
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How to check with javascript if connection is local host?
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Is R's apply family more than syntactic sugar?
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154
The apply functions in R don't provide improved performance over other looping functions (e.g....
Fastest hash for non-cryptographic uses?
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Pandas groupby: How to get a union of strings
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179
In [4]: df = read_csv(StringIO(data),sep='\s+')
In [5]: df
Out[5]:
A B C
0 ...
Converting strings to floats in a DataFrame
...or pd.to_numeric as described in other
answers.
This is available in 0.11. Forces conversion (or set's to nan)
This will work even when astype will fail; its also series by series
so it won't convert say a complete string column
In [10]: df = DataFrame(dict(A = Series(['1.0','1']), B = Series([...
Is there a way to detect if an image is blurry?
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12 Answers
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