how to convert string to an array or one dimension matrix?

here is my Code...

bit = input('number:','s');
bi = str2mat(bit);
fprintf ('%i\n',bi(1));
fprintf ('%g\n',bi(2));
fprintf ('%g\n',bi(3));

why is matlab printing: 49 48 49

instead of 101 ?

Answer 1

[Star Strider]

Because those are the ASCII codes for the numbers 1, 0, 1, and you are asking it to print numbers from a string input. Change it to:

fprintf ('%c\n',bi(1));
fprintf ('%c\n',bi(2));
fprintf ('%c\n',bi(3));

and it works as you want it to.

Answer 2

[Guillaume]

I'm not sure why you're using str2mat. In your case it's a noop.

49 is the ascii code of the '0' character, and 49 is the ascii code of the '1' character. converting a string (or character) to number returns the ascii code(s) of the string / character.

A simple way to convert a string consisting of only '0' and '1' into a matrix of 0 and 1 is to subtract the ascii code of '0' (i.e. 48) from the ascii codes of the strings (either 48 or 49):

bi = bit - '0'; % or bi = bit - 49