How to change the MIN function?

I wrote a function:

function MIN = mymin(vec)
    MIN = vec(1);
  for  i1 = 2:length(vec)
     if MIN > vec(i1), MIN = vec(i1);  
     end
  end
end

I need to satisfy the condition: The function is not receiving a vector; rather, all the values are separate arguments.

How to do it?

Answer 1

[Geoff Hayes]

Sounds like there are a variable number of inputs to this function. So your function can be used like:

mina = mymin(1,2,3,4,5);  % five inputs
minb = mymin(4.5,9,3);    % three inputs

If that is the case, then you want to use the varargin (variable arguments in) input variable in your function signature:

function minval = mymin(varargin)
   % varargin is a cell array

The number of arguments in, nargin, is something you can use in your function body to indicate how many inputs have been passed to your function. Try the above and see what happens.

And check out http://www.mathworks.com/help/matlab/ref/varargin.html for more details.

[Cristian]

This correctly?

function M=mymin(varargin)
    M=varargin{1};
  for  i1 = 2:numel(varargin)
     if M > varargin{i1}
        M = varargin{i1};  
     end
  end
end

[Geoff Hayes]

Yes, that looks to he correct. Try using nargin too.