Thanks much for all the help, R-helpers. Ended up getting the counts of the
categories of the matching variable in both x and y and then limiting the
sample from there. No longer really random, but I think it's fine for my
purposes.
Thanks again.
LB
On 28 September 2010 18:40, Michael Bedward wro
On Tue, 28 Sep 2010, L Brown wrote:
Hi, everyone. I have what I hope will be a simple coding question. It seems
this is a common job, but so far I've had trouble finding the answer in
searches.
I have two matrices (x and y) with a different number of observations in
each. I need to draw a rando
On 29 September 2010 09:47, Remko Duursma wrote:
>
>
> How about:
>
> y[y[,2] %in% x.samp[,2],]
>
> gives you the subset of y where values in the second column are restricted
> to your sample from x.
>
> You can then sample from this matrix, if you need to...
Just saw this reply tangled up in anot
Hello LB,
It's one of those problems that's basic but tricky :) I don't have an
elegant one-liner for it but here's a function that would do it...
function(xs, y) {
# sample matrix y such that col 2 of the sample matches
# col 2 of matrix xs
used <- logical(nrow(y))
yi <- integer(nrow(xs))
Hi, everyone. I have what I hope will be a simple coding question. It seems
this is a common job, but so far I've had trouble finding the answer in
searches.
I have two matrices (x and y) with a different number of observations in
each. I need to draw a random sample without replacement of observa
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