Hi all,

What would be an efficient way to match rows of a matrix to a vector?

ex:

m<-matrix(1:9, nrow=3)

m     [,1] [,2] [,3]
[1,]    1    4    7
[2,]    2    5    8
[3,]    3    6    9

#################################
which(m==c(2,5,8))        # I want this to return 2
######################

Thanks,
Sachin

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