如何创建2D“矩形"矩形.numpy中的数组(1的正方形块，否则0的正方形块)? [英] How to create a 2D "rect" array (square block of 1's, else 0's) in numpy?

问题描述

创建2D numpy矩形"数组的正确"方法是什么，例如:

What is the "correct" way of creating a 2D numpy "rect" array, like:

0000000000000000000
0000000000000000000
0000000000111110000
0000000000111110000
0000000000111110000
0000000000000000000

即一个在给定范围内具有给定值的数组，否则为零?

i.e. an array which has a given value inside certain bounds, or zero otherwise?

推荐答案

只需创建一个零数组并将您想要的面积设置为一即可.

Just create an array of zeros and set the area you want to one.

例如

import numpy as np
data = np.zeros((6,18))
data[2:5, 9:14] = 1
print data

这将产生:

[[ 0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.]
 [ 0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.]
 [ 0.  0.  0.  0.  0.  0.  0.  0.  0.  1.  1.  1.  1.  1.  0.  0.  0.  0.]
 [ 0.  0.  0.  0.  0.  0.  0.  0.  0.  1.  1.  1.  1.  1.  0.  0.  0.  0.]
 [ 0.  0.  0.  0.  0.  0.  0.  0.  0.  1.  1.  1.  1.  1.  0.  0.  0.  0.]
 [ 0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.  0.]]

这篇关于如何创建2D“矩形"矩形.numpy中的数组(1的正方形块，否则0的正方形块)?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！