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From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On
Behalf Of David Scott
Sent: Saturday, March 27, 2010 8:36 PM
To: Peter Ehlers
Cc: r-help@r-project.org; Berend Hasselman
Subject: Re: [R] Matching pairs of values
Many thanks Peter and Berend.
I think I can
I am sure someone can come up with a clever way of doing what I want---I
don't seem to be able to.
I want to check if a pair of numbers occurs as one of the rows of an n
by 2 matrix. If I was only checking whether a single number was in a
vector of numbers I would use %in% but I can't see how
David Scott-6 wrote:
I am sure someone can come up with a clever way of doing what I want---I
don't seem to be able to.
I want to check if a pair of numbers occurs as one of the rows of an n
by 2 matrix. If I was only checking whether a single number was in a
vector of numbers I
On 2010-03-27 2:46, Berend Hasselman wrote:
David Scott-6 wrote:
I am sure someone can come up with a clever way of doing what I want---I
don't seem to be able to.
I want to check if a pair of numbers occurs as one of the rows of an n
by 2 matrix. If I was only checking whether a single
(Sorry, I think that I just hit a wrong button and managed
to send a non-reply.)
I think that David might have meant that the column order of the
numbers in lookfor is unimportant. In that case, a simple fix would
be either to check both lookfor and rev(lookfor) (since the
matrix is nX2) or to
Peter Ehlers wrote:
I think that David might have meant that the column order of the
numbers in lookfor is unimportant. In that case, a simple fix would
be either to check both lookfor and rev(lookfor) (since the
matrix is nX2) or to sort before testing:
vtest - function(x, lookfor){
Many thanks Peter and Berend.
I think I can make this work for my problem. Apologies for not giving an
example: I was a bit tired and frustrated when I posted to R-help and
only on later reflection realised that I didn't really follow the
posting guidelines.
David
Peter Ehlers wrote:
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