Returns a vector of the lengths of the character strings in the input.
USAGE:
nchar(x)
REQUIRED ARGUMENTS:
x:
any S-PLUS object.
VALUE:
a numeric vector the same length as x,
containing the number of characters in each of the
elements of x.
NOTE:
x will be coerced to character, regardless of what it currently
contains.
Something will always happen, but in the case of non-atomic data, the result
may be somewhat surprising.