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deleting rows in numpy array
...rt numpy as np
>>> arr = np.array([[ 0.96488889, 0.73641667, 0.67521429, 0.592875, 0.53172222],
[ 0.78008333, 0.5938125, 0.481, 0.39883333, 0.]])
>>> print arr[arr.all(1)]
array([[ 0.96488889, 0.73641667, 0.67521429, 0.592875 , 0.53172222]])
By the way, this...
MySQL get the date n days ago as a timestamp
...at you want
mysql> SELECT DATE_SUB(NOW(), INTERVAL 30 day);
2009-06-07 21:55:09
mysql> SELECT TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
2009-06-07 21:55:09
mysql> SELECT UNIX_TIMESTAMP(DATE_SUB(NOW(), INTERVAL 30 day));
1244433347
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Reload the path in PowerShell
...
215
Just to bring Rob's comment to light:
$env:Path = [System.Environment]::GetEnvironmentVariabl...
Pandas get topmost n records within each group
..., not by each group
– geominded
Jun 21 '19 at 7:13
1
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Nginx location priority
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edited May 18 at 21:09
Jens
4,85355 gold badges4545 silver badges6464 bronze badges
answered Ma...
XPath - Selecting elements that equal a value
...
GregoireGregoire
21.6k66 gold badges4242 silver badges7070 bronze badges
add a...
How to change column datatype from character to numeric in PostgreSQL 8.4
...NG.
– mu is too short
Mar 14 '16 at 21:03
3
@muistooshort I see from the docs it's actually an ex...
How to replace text between quotes in vi
...
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edited Feb 21 '16 at 8:09
kabirbaidhya
2,08322 gold badges2525 silver badges4545 bronze badges
...
What does the constant 0.0039215689 represent?
...
0.0039215689 is approximately equal to 1/255.
Seeing that this is OpenGL, performance is probably important. So it's probably safe to guess that this was done for performance reasons.
Multiplying by the reciprocal is faster than ...
Javascript : Send JSON Object with Ajax?
...the end of the day.
– mellamokb
Jun 21 '11 at 0:14
17
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