[R] help on selecting values of an object

[David Carlson]

I think this is what you are looking for

> f <- d[match(k, d[,1]), 2]
> f
[1] 4 4 6 6 7 7 6


-------------------------------------
David L Carlson
Associate Professor of Anthropology
Texas A&M University
College Station, TX 77840-4352

-----Original Message-----
From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org] On Behalf Of Andras Farkas
Sent: Thursday, July 4, 2013 1:09 PM
To: r-help at r-project.org
Subject: [R] help on selecting values of an object

Dear List,

please provide some input on the following:
we have

a <-c(0,1,2,3)
b <-c(4,5,6,7)
d <-cbind(a,b)
k <-c(0,0,2,2,3,3,2)

"k" in this case consists of some values of "d[,1]" in a random
sequence. What I am trying to do is to create an object "f" that
would have the values of "d[,2]" in it based on "k", and again, "k"
here is a vector that consists of some values of "d[,1]". Basically
I am trying to match the values in "k" with their corresponding
pairs in "d[,2]". So the result should look like:

f <-c(4,4,6,6,7,7,6)

appreciate your input

Andras

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