Kron error when dealing with sparse gpuarrays
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When I attempt to use kron with a sparse gpu array as an input on R2019a, I get the following error:
"Error using matlab.internal.sparse.kronSparse
Input must be a sparse matrix."
This indicates to me that MATLAB is having issues either making or recognizing when gpuarrays are made sparse, since I've done the simple test case:
a = gpuarray([1 2]);
b = gpuarray([1 2]);
test1 = kron(a,b)
a = sparse(a)
test2 = kron(a,b)
and only the assignment of test2 gives the error. Does anyone know if there's a workaround for this, or am I stuck with using my cpu for these calculations?
3 Comments
Matt J
on 17 Oct 2019
Also, what operations will be done subsequently with kron(a,b) once it is computed? Knowing that, one can often find workarounds that avoid computing the Kronecker product altogether.
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