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min and max of gpuArray

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Massimiliano Zanoli
Massimiliano Zanoli 2020-10-10
编辑： Matt J 2020-10-10
Hi,
why does the following fail? I cannot find any caveat about GPU support of min/max on the documentation. Plus, the error message is really not helping. Maybe it has been solved in R2020?
Is there a way to obtain the linear index of the min/max without fecthing the array from the GPU ?
>> A = rand(3, 3, 3, 'gpuArray');
>> min(A, [], 'all')
ans =
0.0342
>> min(A, [], 'linear')
Error using gpuArray/min
Option must be 'all', 'linear', 'omitnan', or 'includenan'.
>> [minimum, index] = min(A, [], 'linear');
Error using gpuArray/min
Option must be 'all', 'linear', 'omitnan', or 'includenan'.
Thanks!

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Matt J
Matt J 2020-10-10
编辑：Matt J 2020-10-10
I cannot find any caveat about GPU support of min/max on the documentation.
Check the "Extended Capabilities" section of doc min.
Maybe it has been solved in R2020?
Yes, it has.
Is there a way to obtain the linear index of the min/max without fecthing the array from the GPU ?
[minimum, index] = min(A(:));
or to operate along a specific dimension, use the attached function minlidx,
[minimum, index] = minlidx(A,dim);

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