Why ParFor does not work for this?

It is a really simple manipulation. I want to replace some lines of the matrix with zeros.

     A=rand(20,20);
     for j=1:1:4
     A(4*j+1,:)=zeros;
     end

When I replace for with parfor I get a classification error. But the results of the manipulation is independent from each other. I don't understand why.

Thank you Erdem

Answer 1

[Namnendra]

All variables referenced at the top level of the parfor must be resolved and classified. Go through the following link to know more :-

https://lost-contact.mit.edu/afs/inf.ed.ac.uk/group/teaching/matlab-help/R2016b/distcomp/classification-of-variables-in-parfor-loops.html

You can try putting the body of perfor loop into a function and calling the function from the loop.

I hope this helps.