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How to add a new row to an empty numpy array
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237
The way to "start" the array that you want is:
arr = np.empty((0,3), int)
Which is an empty ...
New Array from Index Range Swift
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183
This works for me:
var test = [1, 2, 3]
var n = 2
var test2 = test[0..<n]
Your issue could...
Python division
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or from __future__ import division, which the forces / to adopt Python 3.x's behavior that always returns a float.
>>> from __future__ import division
>>> (10 - 20) / (100 - 10)
-0.1111111111111111
sh...
Version number comparison in Python
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37
Remove the uninteresting part of the string (trailing zeroes and dots), and then compare the li...
What is :: (double colon) in Python when subscripting sequences?
I know that I can use something like string[3:4] to get a substring in Python, but what does the 3 mean in somesequence[::3] ?
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What's the (hidden) cost of Scala's lazy val?
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edited Feb 20 '14 at 20:33
vergenzt
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answered J...
Undefined method 'task' using Rake 0.9.0
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edited Jul 31 '11 at 13:34
Peter Mortensen
26.5k2121 gold badges9292 silver badges122122 bronze badges
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how to draw smooth curve through N points using javascript HTML5 canvas?
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132
The problem with joining subsequent sample points together with disjoint "curveTo" type functio...
Numpy - add row to array
... If it is a 2D-array, how can you then compare its row to a number: i < 3?
EDIT after OP's comment:
A = array([[0, 1, 2], [0, 2, 0]])
X = array([[0, 1, 2], [1, 2, 0], [2, 1, 2], [3, 2, 0]])
add to A all rows from X where the first element < 3:
import numpy as np
A = np.vstack((A, X[X[:,0]...