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How to specify the index of each dimension as an array and perform assignments #191
Description
In python's numpy, you can substitute by specifying the indices of the x and y axes.
import numpy as np
a = np.arange(9).reshape(3,3)
x = [0, 1, 2]
y = [2, 0, 1]
c = [1000, 1001, 1002]
a[x, y] = c
a
# array([[ 0, 1, 1000],
# [1001, 4, 5],
# [ 6, 1002, 8]])The same thing is not possible in Ruby.
What should I do?
a = Numo::Int32.new(3,3).seq
# [[0, 1, 2],
# [3, 0, 5],
# [6, 7, 0]]
x = [0, 1, 2]
y = [2, 0, 1]
c = [1000, 1001, 1002]
a[x, y] = c
# Numo::Int32#shape=[3,3]
# [[0, 0, 1000],
# [0, 0, 1001],
# [0, 0, 1002]]
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