Hello Sarah, thanks for answering
For example if I have the following example
test <- as.data.frame(matrix(c(1,2,3,4, 11,12,13,14, "a","b","b","c"), nrow
= 3, ncol=3,dimnames = list(c("r1","r2","r3","r4"),NULL))
V1 V2 V3
r1 1 11 a
r2 2 12 b
r3 3 13 b
r4 4 14 c
it is easy to select test <- test[,mylist] with for example mylist <-
c("V1","V3")
V1 V3
r1 1 a
r2 2 b
r3 3 b
r4 4 c
But after how can I restrict test in selecting the rows where the result in
column V3 are in a list mylist2, with for example mylist2 <-c("b","c","d") ?
which would give as an example
V1 V3
r2 2 b
r3 3 b
r4 4 c
Regards
Colin
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