How to define a function that can have multiple variables.

For example f(x,y,z) or f(x,y), z is optional. If I list three variables then system uses f(x,y,z), if only 2 variables uses f(x,y).

I know how to use it by nargin function, is there better way to do so?

Thanks.

Answer 1

[the cyclist]

When you say you know how to do it by nargin, does that mean you are also familiar with varargin? That sounds like what you want.

>> doc varargin

There is an example on this page:

http://www.mathworks.com/help/techdoc/ref/varargin.html

[C Zeng]

Hi, thanks. Yes, I know how to do it by nargin, by writing a if nargin<3 command.

Could you write an example by using varragin?

Thank you!

[the cyclist]

I edited my reply to include a web page that has an example.

[C Zeng]

thank you!