How to improve code for gpu?

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Mantas Vaitonis 2018-6-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/405973-how-to-improve-code-for-gpu

评论： Mantas Vaitonis 2018-6-17

Hello everybody. I am bit struggling with the following function for removing duplicate pairs when there is signal for the pair. I would like to move this function to GPU in order not to use for loop. The code is here:

if true
  % code
end
clear;
tic
p1=[5 4 1 2 1]; idx2=[1 2 4 5];n3=[1 2 3 4 5];
p=gpuArray(p1);
idx=gpuArray(idx2);
n=gpuArray(n3);
[m,n2]=size(p);
t=p(p);
otherIdx=ones(size(idx),'gpuArray');
otherIdx1=otherIdx;
idx1=idx;
c=p(p);
for i=1:n2
        if (c(i)==4)
     k(i)=any(p(i)==idx1);
       k1(i)=any(c(i)==idx1);
       k2(i)=any(otherIdx1((c(i)==idx1)));
      [idxx,otherIdxx]=arrayfun(@testas,k,k1,k2);
        end
            if any(p(i)==idx)
                if any(c(i)==idx)
                    if otherIdx((c(i)==idx))==1
                        idx(c(i)==idx)=NaN; 
                        otherIdx(p(i))=0;          
                  %  end
                end
            end
          end
end
idx
toc
//////////////////////
function [idxx,otherIdxx]=testas(k,k1,k2)
if k==1   
  if k1==1
     if k2==1
     idxx=NaN; 
     otherIdxx=0;          
     end
  end
end
end