Overloading User Written Function

I have a function that can take a variable number of inputs. The function definition looks like this:

 function [i] = fun(func,argin1,argin2,argin3, argin4, argin5,argin6,argin7)

These variables then get passed into a switch statement like this:

 switch nargin
    case 1
        try
            i = calllib('User_DLL',func);

        catch exception
            str = {exception.identifier,sprintf('%s did not load',func)};
            h = warndlg(str);
            waitfor(h);
        end
    case 2
        try
            i = calllib('User_DLL',func,argin1);

        catch exception
            str = {exception.identifier,sprintf('%s did not load',func)};
            h = warndlg(str);
            waitfor(h);
        end...

And it keeps going for all possible number of inputs. Is there a way to overload this function so that I just need to know the number of input and then I can pass the input arguments into calllib in the order they first appeared in? It seems like this process can be greatly streamlined.

Answer 1

[Adam]

I think generally for this you would use a varargin type of input to your function.

You can then test the length of varargin and you can pass it on as varagin{:} to another function that also wants those arguments in the same way.

e.g. if you have a function that will call the plot(...) function you can have a varargin argument to your function (even after named arguments) and then just pass it straight to plot as varargin{:} if you know the arguments are in a form that plot accepts - e.g. property, value pairs.

For example I have a function in one of my classes that does the following:

function setGUIHandleProperty( guiHandle, varargin )
    if ishandle( guiHandle )
        set( guiHandle, varargin{:} );
    end
end

which just acts as a wrapper for setting some figure properties.

[Marc]

Thank you. That's exactly what I was looking for, trimming down an 85 line long switch statement to 10 lines.