How do I construct a complex gpuArray directly on the GPU?

17 views (last 30 days)
I am trying to initialize a complex gpuArray directly on the GPU (i.e. without first creating a complex array in host memory and then copying it over to the device).
So far the only thing I've found that works is:
foo = gpuArray(complex(0));
bar = zeros(4, 1, 'like',foo);
which seems kinda silly. Is there a way to allocate a complex gpuArray directly using something like gpuArray.zeros?

Accepted Answer

Edric Ellis
Edric Ellis on 12 Sep 2017
None of MATLAB's build methods (the zeros, ones family) build complex arrays, so the nearest you can get is to do something like:
complex(zeros(3, 'gpuArray'))
which never allocates any host memory, and results in a complex gpuArray.
  1 Comment
Jacob Lynch August
Jacob Lynch August on 9 Nov 2018
What about elements on the host that need to be transferred to the GPU, like
G = complex( gpuArray(V(:,1)), gpuArray(:,2) );
It seems silly to me to have those two temporary gpuArrays.

Sign in to comment.

More Answers (1)

KSSV on 12 Sep 2017
G = gpuArray(rand(10,1)+1i*rand(10,1));
Jacob Lynch August
Jacob Lynch August on 9 Nov 2018

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!