function [q,r] = swapInputs(a,b)
[q1,r1] = cart2pol(a,b);
q1=(pi/2)-q1;
[q,r]=pol2cart(q1,r1);
end

if u run above code in matlab it successfully swaps any input argument. why it is not accepting solution ?

[r, q] = deal(a,b)

This is a correct solution - alas using a function handle, not an m-file

You are brilliant when you are lazy

Omg love this solution so simple and easy really clever! Didn't think about this :)

I feel so pride that I just get the same code like this leading one!!!

I had no idea it'd be this simple.