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Asked: 2026-06-05T18:08:47+00:00

I’m using Numpy and have a 7x12x12 matrix whose values I would like to

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I’m using Numpy and have a 7x12x12 matrix whose values I would like to populate in 12×12 chunks, 7 different times. Suppose I have these 12×12 matrices: 

first_Matrix
second_Matrix
third_Matrix
... (etc)
seventh_Matrix = first_Matrix + second_Matrix + third_Matrix...

that I’d like to add to:

grand_Matrix

How can I do this? I assume there is a better way than loops that map the coordinates from one matrix to the next, and if there’s not, could someone please write out the code for mapping first_Matrix into the first 12×12 element of grand_Matrix?

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1 Answer

  1. Editorial Team
    grand_Matrix[0,...] = first_Matrix
grand_Matrix[1,...] = second_Matrix

    and so on.

    Anyway, as @Lattyware commented, it is a bad design to have extra names for so many such homogenous objects.

    If you have a list of 12×12 matrices:

    grand_Matrix = np.vstack(m[None,...] for m in matrices)

    None adds a new dimension to each matrix and stacks them along this dimension.

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