Avoid for loops with if inside

Hello everyone,

This is my code:

counter=1;
for i=1:size(A,1)
  for j=counter:size(B,1)
     if D(1,B(j,1))>0
        if B(j,2)-A(i,2)<5
           C(A(i,1),B(j,1))=C(A(i,1),B(j,1))+1;
           D(1,B(j,1))=D(1,B(j,1))-1;
           B(j,3)=1;
           counter=j+1;
        end
        break; 
     end
  end
end

A is an 100*3 matrix B is an 1000*3 matrix C is an 100*1000 matrix D is an 1*1000 matrix

So, can it be written by much less computational effort? Any comment is very appreciated! Thanks!

Answer 1

[Doug Hull]

If it is working, what are you trying to accomplish by changing it. Have you run it through the profiler to find out that this is the bottleneck in your code slowing it down?

[Alireza]

Thank you! Yes, you are right! That was not the bottleneck of my code. I checked the run time and that was fine.