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Alex Rivera
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Define z<- as.character(c("1_xx xx xxx_xxxx_12_sep.xls","2_xx xx xxx_xxxx_15_aug.xls")) such that > z [1] "1_xx xx xxx_xxxx_12_sep.xls" "2_xx xx xxx_xxxx_15_aug.xls" I want to create a vector w such that > w [1] "1_12_sep" "2_15_aug" That is, split each element of z by _ and then join elements 1,4,5, with the .xls removed from the latter. I can manage the split part, but not sure what function to provide, e.g something like" w <- as.character(lapply(strsplit(z,"_"), function(x) ???))
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