Can Matlab do this without using a for loop?

Hi, I'm new to Matlab and need some help. I'm using a for loop to calculate all Rs from all combination of A and B. How can I do that?Can Matlab do this without using a for loop?

this is my code

A=(-15:0.175:-1); B=(8:0.1:16);

R = zeros(81);

for i = 1:8

for j =1:81

C = A(i)* erf(x) + B(j);

R = (y-C).^2;

end

end

end

thanks,

Answer 1

[Sean de Wolski]

It looks like you are only saving the output from the final iteration.

If you wanted a matrix of every combination, this should do it:

A=(-15:0.175:-1); B=(8:0.1:16);
R2 = (y - bsxfun(@(a,b)a*erf(x)+b,A,B.')).^2

[Ali]

thank you but I tried that and I have a problem with matrix dimensions

Error using + Matrix dimensions must agree.

Error in @(a,b)a*erf(x)+b

both y and x have the size of 1 1000 both A and B have a size of 1 81

[Ali]

I just realized that I need to make A and B the same size as x. Is it possible to expand bsxfun to include 4 parameters A, B ,C and D?

Thanks for your help