isdigit
check that characters of a string are digits between 0 and 9
Syntax
res = isdigit(str)
Arguments
- str
a character string.
- res
a boolean matrix.
Description
res = isdigit(str) returns an array the same size as
str containing logical %t
(TRUE) where the elements of str are digits and
logical %f (FALSE) where they are not.
Examples
s = 'A1,B2,C3'; isdigit(s)
See also
- isalphanum — check that characters of a string are alphanumerics
- isletter — check that characters of a string are alphabetic letters
- isnum — tests if a string represents a number
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