check whather user input is given or Not and check the validation

I wrote a code and while executing it sometimes i will skip some inputs then it will continue to second line, whle computing it will show error and exit. so i want to eliminate ot by making sure the user given input and show him all the given inputs and giving cahncce to change them if required then continue can you please help

Answer 1

[Dhanush Bejjarapu]

Do you mean that we need to give input for few parameters and they should be used for the next steps?

[ORUGANTI SIVAMURALIKRISHNA]

if input is not given then ask for the input again or exit the program

Answer 2

[Walter Roberson]

function varargout = YourFunction(varargin)
  argnames = {'x', 'y', 'n'};
  for K = 1 : length(argnames)
      if nargin < K || isempty(varargin{K}) || any(isnan(varargin{K}(:)))
          new_parameter = input( sprintf('Enter a value for %s ', argnames{K} ) );
          newargs = varargin;
          newargs{K} = new_parameter;
          [varargout{:}] = YourFunction(newargs{L});
          return
      end
  end
  %if you got here, your argument validation passed, so do your regular computation
end

[ORUGANTI SIVAMURALIKRISHNA]

Sorry,

I can't able to understand how to use this. please provide with example

[Walter Roberson]

YourFunction(nan, 123)

[ORUGANTI SIVAMURALIKRISHNA]

rised line command : Enter a value for x and input is given as 5

reply as error:

Expected one output from a curly brace or dot indexing expression, but there were 0 results.