[R] How to match some patterns in a matrix

From: ss <affysnp_at_gmail.com>
Date: Fri, 11 Apr 2008 14:23:19 -0400


Dear all,

I have a data frame called x2, which looks like:

> dim(x2)

[1] 2237 2
> x2[1:4,1:2]

    name                       id
1 STye                      hggd3
2 STy2                      bffbd2
3 qw22e                    bdbdbbbd7
4 deffrdff                    nnshfd3

and a vector called y, which looks like:

> dim(y)

[1] 135 1
> y[1:3,1]
[1] ABCDE BDH5 DESRP1 y is a subset of x2$name and I want to select the rows in x2 whose 'name' match
y. Is there an easy way to do so?

I tried subset(x2, y) but it did not work.

Thanks much for your advice.

Alex

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