[R] check for item in vector

[Ivan Calandra]

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.calandra at uni-hamburg.de

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