How can I define an array of sparse matrix? (both for GPU and CPU)

A=sparse(3,3)
MT=gpuArray(A);
M2(1,1)=1
%Error using gpuArray/subsasgn
%Sparse gpuArrays are not supported for this function.
L=sparse(3,3,1);
L(:,:,1)=A;
%N-dimensional indexing allowed for full matrices only.
L2=gpuArray(L);
L2(:,:,1)=MT;
%Error using gpuArray/subsasgn
%Sparse gpuArrays are not supported for this function.

Answer 1

[James Tursa]

For CPU, you can use the ndSparse submission by Matt J on the FEX:

https://www.mathworks.com/matlabcentral/fileexchange/29832-n-dimensional-sparse-arrays?s_tid=srchtitle

I am unaware of anything similar for GPU.

Answer 2

[Amin zaami]

See example below for sparse on GPU:

sparse(A1,A2,gpuArray(1),m1,m2);

sparse(41200,41200,gpuArray(1),41200,41200);

• first 2 arguments for size, last two for memory,
• there should be always A1<m1 & A2 <m2