MATLAB Programming Fundamentals - MathWorks

addRequired(p,'num',@checknum);

parse(p,num);

function TF = checknum(x)

TF = false;

if ~isscalar(x)

error('Input is not scalar');

elseif ~isnumeric(x)

error('Input is not numeric');

elseif (x <= 0)

error('Input must be > 0');

else

TF = true;

end

Call the function with an invalid input:

usenum(-1)

Error using usenum (line 4)

The value of 'num' is invalid. Input must be > 0

See Also

inputParser | is* | validateattributes

Related Examples

• “Parse Function Inputs” on page 21-17


• “Create Function Handle” on page 13-2

More About

• “Anonymous Functions” on page 20-24

21 Function Arguments