2

I am looking to take (non-sparse example):

[1 1 1
 1 1 1
 1 1 1]

[2 2 2
 2 2 2
 2 2 2]

And get

[1 1 1
 1 1 1
 1 1 1
 2 2 2
 2 2 2
 2 2 2]

I think this is called a concatenation? I am using csr_matrix.

Improve this question
2
  • 1
    Possible duplicate of Python how to combine two matrices in numpy Commented Oct 22, 2019 at 21:40
  • 2
    For numpy arrays there's np.concatenate and a group of 'stack' functions that use it. For sparse, there's sparse.vstack and sparse.hstack. Both use the spare bmat operation, which combines the the coo attributes of the matrices. Commented Oct 22, 2019 at 22:37
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