rename first column r code example

Example 1: R rename singl edf column

colnames(trSamp)[2] <- "newname2"

Example 2: rename column in r

# df = dataframe
# old.var.name = The name you don't like anymore
# new.var.name = The name you want to get

names(df)[names(df) == 'old.var.name'] <- 'new.var.name'