How can I find out the index of an element from row and column in Python?

0 votes
I have the rows and columns of a matrix and need to find the index. In my case I have a 6x6 matrix and would like to
find the index of the data at [3,3]

here's my code

[code]
heatmap = np.zeros((6,6), dtype=int);
index? = someFuction(heatmap[r,c]);
[/code]
Apr 16, 2018 in Python by aryya
• 7,350 points
189 views

1 answer to this question.

0 votes
You probably want to use np.ravel_multi_index:

[code]
import numpy as np
heatmap = np.zeros((6,6), dtype=int)
index = np.ravel_multi_index([[3], [3]], heatmap.shape)
print(index)
>>> [21]
[/code]
answered Apr 16, 2018 by charlie_brown
• 7,760 points

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