Section: String Functions
isdigit functions returns a logical array that is 1
for characters in the argument string that are digits, and
is a logical 0 for characters in the argument that are not
digits. The syntax for its use is
x = isdigit(s)
where s is a string.
isdigit:
--> isdigit('numb3r5')
ans =
<logical> - size: [1 7]
Columns 1 to 7
0 0 0 0 1 0 1