Hi, I have a matrix. >a<-cbind(c("a","b","a"),c(4,3,6)) [,1] [,2] [1,] "a" "4" [2,] "b" "3" [3,] "a" "6"
I want to remove rows in matrix a whose first column has frequency less than 2. in about example matrix a becomes [,1] [,2] [1,] "a" "4" [2,] "a" "6" [[alternative HTML version deleted]]
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