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test if elements of a character vector contain letters

Liviu Andronic
On Tue, Aug 7, 2012 at 10:26 PM, Marc Schwartz <marc_schwartz at me.com> wrote:
And I should start reading more carefully. The above works fine for me.

I ended up defining the following wrappers:
is_alpha <- function(x) {grepl("[[:alpha:]]", x)}  ##Alphabetic characters
is_digit <- function(x) {grepl("[[:digit:]]", x)}  ##Digits
is_alnum <- function(x) {grepl("[[:alnum:]]", x)}  ##Alphanumeric characters
is_punct <- function(x) {grepl("[[:punct:]]", x)}  ##Punctuation characters
is_notalnum <- function(x) {grepl("[^[:alnum:]]", x)}
##Non-Alphanumeric characters


Thanks again
Liviu

Thread (19 messages)

Liviu Andronic test if elements of a character vector contain letters Aug 6 Bert Gunter test if elements of a character vector contain letters Aug 6 Rui Barradas test if elements of a character vector contain letters Aug 6 arun test if elements of a character vector contain letters Aug 6 Martin Morgan test if elements of a character vector contain letters Aug 6 Marc Schwartz test if elements of a character vector contain letters Aug 6 arun test if elements of a character vector contain letters Aug 6 Marc Schwartz test if elements of a character vector contain letters Aug 6 David L Carlson test if elements of a character vector contain letters Aug 6 Liviu Andronic test if elements of a character vector contain letters Aug 6 Yihui Xie test if elements of a character vector contain letters Aug 6 Liviu Andronic test if elements of a character vector contain letters Aug 6 Liviu Andronic test if elements of a character vector contain letters Aug 7 R. Michael Weylandt test if elements of a character vector contain letters Aug 7 Liviu Andronic test if elements of a character vector contain letters Aug 7 Marc Schwartz test if elements of a character vector contain letters Aug 7 Marc Schwartz test if elements of a character vector contain letters Aug 7 Liviu Andronic test if elements of a character vector contain letters Aug 7 Liviu Andronic test if elements of a character vector contain letters Aug 8