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Delete Particular Rows From Matrix.

05.26.2005
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> x <- matrix(1:10,,2)
> x[x[,1]%in%c(2,3),]
> x[!x[,1]%in%c(2,3),]

from Peter Malewski or from Peter Dalgaard:

> mat[!(mat$first %in% 713:715),]