MATLAB: Matrix Input Validation Help

arrayhelpinputMATLABstring

Hello,
I am trying to validate a user input as numeric while forcing the user to repeat if it is not. I currently have this working well as long as the user does not input a letter that is non numeric. I would like it to prompt the user again if they input a string instead of a number. Any help is appreciated.
Thanks
my input looks like
array(r, c) = str2num(input(['Digit for position ', num2str(c), ': '], 's'));
        
        while array(r, c) > 6 || array(r, c) < 0
         
            GUESS(r, c) = str2num(input(['Digit for position ', num2str(cc), ': '], 's'));
        end

Best Answer

        array(r, c) = str2double(input(['Digit for position ', num2str(c), ': '], 's'));
        
        while isnan(array(r,c)) || array(r,c) ~= fix(array(r,c)) || array(r, c) < 0 || array(r, c) > 6
            array(r, c) = str2double(input(['Digit for position ', num2str(cc), ': '], 's'));
        end
or
array(r, c) = str2double(input(['Digit for position ', num2str(c), ': '], 's'));
while ~ismember(array(r,c), 0:6)
   array(r, c) = str2double(input(['Digit for position ', num2str(cc), ': '], 's'));
end
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