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Thanks in advance for any help I can get on this. I'm trying to change variable names between 2 systems - R and old SPSS, Oracle. I'm using the grep() and gsub() commands but I'm getting the following result - > test.dat <- c("a", "b.c", "d.e.f", "p_q,r") > test.dat [1] "a" "b.c" "d.e.f"