How to return a vector output for a vector input for a custom made function?

Hi, I know from experience that some Matlab functions like cos will also return a vector if it's input is a vector, i.e. cos(vector) is a vector. Is it possible to do the same with a custom function I've written myself? I am asking this because I want to avoid writing for loops because in Matlab for loops take a long time to execute.

Answer 1

[John D'Errico]

Of course you can.

function y = myfun(x)
  y = x;
end

This returns the vector y, given input vector x. WTP?