Hello R-users
I have a situation like this
x=c(1,3,2)
y=data.frame("a"=1:3, "b"=4:6, "c"=7:9)*2
So we have
> t(t(x))
[,1]
[1,] 1
[2,] 3
[3,] 2
And
> y
a b c
1 2 8 14
2 4 10 16
3 6 12 18
I would like to obtain a vector with number taken from the data.frame: x is
needed as row index
With c(1,3,2), in this case the ouput should be
2
16
12
I've tried a little bit with apply, but unsuccessfully.
Thank you
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