does this do what you want?

sapply(y,function(y){which(y==x)})

hth, Ingmar

On 28 Nov 2007, at 15:53, Serguei Kaniovski wrote:

>
> Hallo,
>
> I have two vectors of different lengths which contain the same set of
> values:
>
> X < -c(2,6,1,7,4,3,5)
> Y <- c(1,1,6,4,6,1,4,1,2,3,6,6,1,2,4,4,5,4,1,7,6,6,4,4,7,1,2)
>
> How can I replace the values in Y with the index (!) of the  
> corresponding
> values in X. So 2 appears in X in the first coordinate, so all 2’s  
> in Y
> should be replaced by 1, etc.
>
> Thank you for your help,
> Serguei
>
> ________________________________________
> Austrian Institute of Economic Research (WIFO)
>
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>
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> and provide commented, minimal, self-contained, reproducible code.

Ingmar Visser
Department of Psychology, University of Amsterdam
Roetersstraat 15
1018 WB Amsterdam
The Netherlands
t: +31-20-5256723



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