Function Arguments Using Nargin

I want to control the arguments (data sets) in a function to plot. So if I push in only one data set (x1,y1) into the function, it will plot that data and not get an error that x2 is empty or cleared variable. Or if I push in two data sets (x1,y1,x2,y2) it will plot that. Here is the code:

 %.........................
 %testing data set
 %.........................

 x1 = [1 1 1 1 1];
 y1 = [1 2 3 4 5];

 x2 = [2 2 2 2 2];
 y2 = [1 2 3 4 5];
 %...........................
 function plotinputs(x1,y2,x2,y2)

 if nargin == 2
    plot(x1,y1)

 else nargin == 4
    plot(x1,y1,x2,y2)

 end

Thanks, Amanda

[per isakson]

What happened when you tested the code?

[Muthu Annamalai]

Amanda what you are looking at is called 'varargin' documented with usable examples http://www.mathworks.com/help/matlab/ref/varargin.html

You need to process the cell array 'varargin' according to the number of args, which you already know, is 'nargin'.

You have all the pieces right, and you only need the right 'varagin' bits.

[Amanda]

I knew I was missing some pieces in the code. I will check out the reference. Thanks a lot.

Answer 1

[Azzi Abdelmalek]

There is an error

function plotinputs(x1,y2,x2,y2)

it should be

function plotinputs(x1,y1,x2,y2)