is it possible to check warning message?

I would like to check if a function display a warning or not? Is it possible?

Answer 1

[Image Analyst]

Try using lastwarn:

% Initialize the global lastwarn variable to "Success"
lastwarn('Success') 
% Some code that may or may not produce an error
a=10;
% Check if a warning was issued.
if strcmp(lastwarn, 'Success')
  % All is well - no warning.
  fprintf('All is well - no warning.\n');
else
  % A warning was issued.
  fprintf('A warning was issued..\n');
end