Avoid "for", "if" and "else" loop

Hi I have a code like this:

If there any way, that I can avoid for, if else loop? For now the k = 22, but most of the time and i have k closed to 9000+ and it took a lot of computation time. Thanks!

for k=1:22
    for j=1:1400
        if Ev(k,j)==0 | (((E_beta(k,1)-Ev(k,j))^2)-(0.511^2))<0, p(k,j)=0;
        else
        p(k,j)=sqrt(((E_beta(k,1)-Ev(k,j))^2)-(0.511^2));
        end
    end
end

Answer 1

[Matt J]

D=(E_beta-Ev).^2-0.511^2;

D( D<0 | ~Ev)=0;

p=sqrt(D);

[Hokkien]

Hi Matt tahnk you! By the way, what's the meaning for ~Ev?

[Matt J]

You're welcome, but pleae Accept-click the answer if it does what you need.

~Ev is the same thing as Ev==0.

https://www.mathworks.com/help/matlab/ref/not.html