How to reassign values for sparse GPU arrays?

Question

pb 2018-11-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429358-how-to-reassign-values-for-sparse-gpu-arrays

回答： Joss Knight 2018-11-14

I created a sparse GPU array (say L=sparse(1:Nper-1,2:Nper,x,Nper,Nper), where x is a GPU array ). Then I tried to reassign values using: L(1,1)=0; L(1,2)=0;

I get the following error:

Error using gpuArray/subsasgn
Sparse gpuArrays are not supported for this
function.
Error in a/f (line 45)
        L(1,1)=0; L(1,2)=0;

Can anyone tell me how to solve problem in simple way? (assume that I can't assign correct values while creating array...I have to reassign later)

Thank you.

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Answer 1

Joss Knight 2018-11-14

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/429358-how-to-reassign-values-for-sparse-gpu-arrays#answer_346798

You can use FIND to retrieve the nonzeros and their row and column indices. Then replace the values you want and construct a new sparse array as before.