MATLAB: I wanna define function which has flexible number of argument.

MATLABmatlab function

Hello and happy new year!

Now I'm considering to define function which has flexible arguments.

For example, let's have function F which full argument number is 3 such as F(a,b,c)

If b is 0, user don't need to assign c thus F(a,b) is enough. Otherwise full argument assignment is required.

Can I make this kind of flexible function?

Best Answer

function out = F(varargin)
 % do stuffs

 % y = varargin{1}+varargin{2}
 % out = y+1; etc.

For flexible number of outputs:

function varargout = F(varargin)
% do stuffs
% varargout{1} = varargin{1}-varargin{2}
% etc.

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MATLAB: Not Enough Input Argument. .

At the command line, you must type the command

zdata = [0      1   0   1.0
       0      2   0   0.8
       1      2   0   0.4
       1      3   0   0.2
       2      3   0   0.2
       3      4   0   0.08];
PSMv(zdata)

Question: what is ybus() ? And why do you re-calculate the value of "Y" ?

MATLAB: How to set an optional function input as a first input

You can pass whatever you want to the parser; it doesn't get automatically what is passed to the function, but works on what you pass to its parse method. You have therefore the freedom to do something like:

 function foo( varargin )
    % - Extract first optional axes handle. Remove if present.
    if ~isempty( varargin ) && ishandle( varargin{1} )
       ax = varargin{1} ;
       varargin = varargin(2:end) ;
    else
       ax = [] ;
    end
    % - Build input parser and parse remaining args.
    parser = inputParser ;
    parser.StructExpand  = true ;
    parser.CaseSensitive = false ;
    parser.addRequired( .. ) ;
    .. etc.
    parser.parse( varargin{:} ) ;  % Pass only remaining args.
    args = parser.Results ;
    % - ...
 end

Best Answer

Related Solutions

MATLAB: Not Enough Input Argument. .

MATLAB: How to set an optional function input as a first input

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