Recognize Number/Special Characters

Hi,

I have below input string and from it I want to recognize digits/special characters, May be some flag can be set

txt='har23#$'

Like if alphabet then flag=1 and for digits/Special Characters flag=0

Pls provide me some direction..

Thanks in Advance..

[Sven]

Have you used regular expressions before? They can be quite useful.

txt='har23#$';

badChars = regexp(txt,'[^A-Za-z0-9]');

if isempty(badChars)

disp 'All valid characters'

else

fprintf('Bad characters detected: %s\n', txt(badChars))

end

Answer 1

[Walter Roberson]

txtisalpha = ismember(txt, ['a':'z', 'A':'Z']);

Then txtisalpha will be a vector with true for English letters and false for other characters (including spaces).