From: Antje Döring <Antje.Doering_at_komdat.com>

Date: Tue 22 Nov 2005 - 02:57:05 EST

R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Nov 22 03:05:07 2005

Date: Tue 22 Nov 2005 - 02:57:05 EST

Hi there,

I have a question, which I thought is very easy to solve, but somehow I can't find a solution. Probably someone could help me quickly?

Here it is:

I have two matrices:

a

[,1] [,2] [,3]

[1,] 1 4 9

[3,] 3 6 11

[4,] 4 8 12

b

[,1] [,2]

[1,] 1 4

[2,] 2 5

[3,] 3 6

Now I want to find out which rows of b can also be found in a (without its last column). So the solution must be something like either "TRUE FALSE TRUE" or the rows where their is a match (rows 1 and 3)

Till now I have tried things like b %in% a[,1:2] or so but that doesn't work because I want to compare the WHOLE row of b with the whole row of a without column 3.

Thank you very much for any help.

Regards, Antje

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R-help@stat.math.ethz.ch mailing list

https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Tue Nov 22 03:05:07 2005

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