Hi,
See ?"%in%" or ?match
animal <- c("Tiger","Panda")
"Tiger" %in% animal
[1] TRUE
"Acacia" %in% animal
[1] FALSE
"Panda" %in% animal
[1] TRUE
HTH,
Ivan
Le 12/13/2010 15:48, C.H. a écrit :
Dear R users,
Suppose I have an vector like this:
animal<- c("Tiger","Panda")
I would like to know is there any function that check for the
existence of certain item in a vector.
e.g.
func("Tiger",animal) # check for the existence of "Tiger"
TRUE
func("Acacia",animal) #Acacia is not an item of the animal vector
FALSE
I know that it can be done by for loop. But I would like to know is
there any built-in function for that.
Thank you very much.
CH
--
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calan...@uni-hamburg.de
**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/1525_8_1.php
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
