I dont see the file attached. However, once you open that function in matlab, you'll see something like tyhis on the first line:
function [a,b] = function_name(x,y,z) % function name will be different
Here, x,y,z are the inputs and a and b are the outputs.
You can use the function as:
[m,n] = function_name(x,y,z);
Just make sure that this function's .m file is in the same folder that you're in.
