Let's say your function will have a name myFunction. As I understood, you want to pass a parameter to this function and get two output variables from it.
To call the function you use the following syntax:
To build your own function crate a file->new, paste this code and save as a separate file:
function [ M n ] = myFunction(inputParameter)
The function will return matrix 'M' 10x10 of ones and 'n' will be your input scaled by 5.