MATLAB Programming Fundamentals - MathWorks

Find Number of Function Arguments

This example shows how to determine how many input or output arguments your function

receives using nargin and nargout.

Input Arguments

Create a function in a file named addme.m that accepts up to two inputs. Identify the

number of inputs with nargin.

function c = addme(a,b)

switch nargin

case 2

c = a + b;

case 1

c = a + a;

otherwise

c = 0;

end

Call addme with one, two, or zero input arguments.

addme(42)

ans =

84

addme(2,4000)

ans =

4002

addme

ans =

0

Output Arguments

Create a new function in a file named addme2.m that can return one or two outputs (a

result and its absolute value). Identify the number of requested outputs with nargout.

function [result,absResult] = addme2(a,b)

21 Function Arguments