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Sorting arrays in NumPy by column
...rn a copy:
In [1]: import numpy as np
In [2]: a = np.array([[1,2,3],[4,5,6],[0,0,1]])
In [3]: np.sort(a.view('i8,i8,i8'), order=['f1'], axis=0).view(np.int)
Out[3]:
array([[0, 0, 1],
[1, 2, 3],
[4, 5, 6]])
To sort it in-place:
In [6]: a.view('i8,i8,i8').sort(order=['f1'], axis=0...
How can I count the number of matches for a regex?
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edited Apr 6 at 20:17
answered Sep 11 '11 at 13:24
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Getting the first character of a string with $str[0]
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HockHock
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7
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What does numpy.random.seed(0) do?
...t;> numpy.random.seed(0) ; numpy.random.rand(4)
array([ 0.55, 0.72, 0.6 , 0.54])
>>> numpy.random.seed(0) ; numpy.random.rand(4)
array([ 0.55, 0.72, 0.6 , 0.54])
With the seed reset (every time), the same set of numbers will appear every time.
If the random seed is not reset, di...
How to add title to subplots in Matplotlib?
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answered Aug 24 '16 at 21:57
JaradJarad
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MySql: Tinyint (2) vs tinyint(1) - what is the difference?
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edited Dec 2 '16 at 18:39
answered Dec 2 '16 at 18:33
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Array include any value from another array?
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edited Jan 18 at 6:58
answered Oct 15 '10 at 11:55
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Create list of single item repeated N times
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6 Answers
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Convert list of dictionaries to a pandas DataFrame
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cs95
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answered Dec 17 '13 at 15:35
jorisjoris
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Print all but the first three columns
...S; if(NF) printf "%s",$NF; printf ORS}'
### Example ###
$ echo '1 2 3 4 5 6 7' |
awk '{for(i=4;i<NF;i++)printf"%s",$i OFS;if(NF)printf"%s",$NF;printf ORS}' |
tr ' ' '-'
4-5-6-7
Sudo_O proposes an elegant improvement using the ternary operator NF?ORS:OFS
$ echo '1 2 3 4 5 6 7' |
awk '{ f...