MatLab Creating a Function that takes inputs and Generates a Random Matrix of dimensions of the largest input

"Create a function in an m-file that takes inputs “x” and “z” and generates any random matrix of dimension “x” or “z”, whichever is larger"

function m= myFunction(x,z)

t =0:pi/100:2*pi ;

if x>z linalg:randomMatrix(x,x); else linalg::randomMatrix(z,z); end

Is what I have? How can I make this work??