how to place zeros instead of blanks in array

hello everyone, i have a char array of size 358695x3, that is 358695 rows and it is called B, when i write the following code str2num(B) I just have 7000 rows in the output, i found out that B has alot of blanks [] in it so i cannot use str2num, what is the way to fill those blanks in B with zeros please? so i have 358695 rows when i do the str2num on it. help please

[MAHMOUD ALZIOUD]

i used this code but it is not working.

      B(find(isnan(B)))=0;

Answer 1

[James Tursa]

If you really mean blank spaces, then e.g.

B(B==' ') = '0';

[MAHMOUD ALZIOUD]

it worked , thank you very much for your help