How to use parfor function to update a 2d array

Hi,

I am currenty using a 2d array to run some surface propogation algorithms. My current implementation of nested for loops is too time consuming and I heard that parfor can help speed up this task as the update function does not depend on the new output values of the function. Basically my current code is structured as follows:

for i=1:30
    for j=1:30
        phi(i,j)=f(i,j) %Compute the function value based on the current position
    end
end

I was wondering if changing the first for loop to parfor will retain the functionality of my code:

parfor i=1:30
    for j=1:30
        phi(i,j)=f(i,j) %Compute the function value based on the current position
    end
end

Is this a correct implementation of a parfor loop for my implementation?

Answer 1

[Raymond Norris]

Hi Ammar,

As you've written, yes, this will work fine. Reference this doc for any troubleshooting.

https://www.mathworks.com/help/parallel-computing/troubleshoot-variables-in-parfor-loops.html

Raymond

[Ammar Malick]

Thank you for your prompt response Raymond.