[Solved] Changing a column of a dataframe in R

Question

You could use gsub here

x<-c("s1-112", "s10-112", "s3656-112")
gsub("s(.*)-112", "\\1", x)
# [1] "1"    "10"   "3656"

Accepted Answer

You could use gsub here

x<-c("s1-112", "s10-112", "s3656-112")
gsub("s(.*)-112", "\\1", x)
# [1] "1"    "10"   "3656"