ho to change cell array elemen value to Nan, when using gpuarray?

1 次查看（过去 30 天）
Mantas Vaitonis
Mantas Vaitonis 2018-6-19
评论： Mantas Vaitonis 2018-6-19
Hello Everyone,
Maybe somebody has a solution for this case? I have gpu cellarray with 1x499 and cells within 5x5. I would like to find zeros and change them to Nan. What I managed to do is here:
SQ=cellfun(@(x)(x==0,NaN,x), SQ,'UniformOutput',false);
  1 个评论
Mantas Vaitonis
Mantas Vaitonis 2018-6-19
Did change code a bit:
SQ(cellfun(@(x) x == 0, SQ{:, :}, 'UniformOutput', false)) = {NaN};
However, didi receive this error: Error using cellfun Input #2 expected to be a cell array, was gpuArray instead.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Edric Ellis
Edric Ellis 2018-6-19
Instead of a 1x499 cell array of 5x5 gpuArray matrices, why not consider a 5x5x499 array. You can convert your existing cell array like this:
SQ_array = cat(3, SQ{:}); % concatenate in 3rd dimension, result is 5x5x499
Then, you can simply do:
SQ_array(SQ_array == 0) = NaN;
To do this using cellfun, the simplest way is to use standardizeMissing:
cellfun(@(x) standardizeMissing(x, 0), SQ, 'UniformOutput', false)
  3 个评论
显示 1更早的评论
Edric Ellis
Edric Ellis 2018-6-19
You can use mat2cell, like this:
mat2cell(SQ_array, 5, 5, ones(1, 499))
but really, I suspect you'd be much better off retaining the array form if you can. A 5x5 matrix is usually much too small for the GPU to offer much benefit - you need to keep your GPU busy by feeding it lots of data all at once in a single array-based operation. You've got a much better chance with a 5x5x499 array.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 GPU Computing in MATLAB 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by