r set dataframe column names

1R> X <- data.frame(bad=1:3, worse=rnorm(3))
2R> X
3  bad     worse
41   1 -2.440467
52   2  1.320113
63   3 -0.306639
7R> colnames(X) <- c("good", "better")
8R> X
9  good    better
101    1 -2.440467
112    2  1.320113
123    3 -0.306639

1colnames(dataset) <- c('name1','name2',..)

1# This works well if you need an empty dataframe with n known columns
2df <- data.frame(matrix(ncol = 3, nrow = 0))
3x <- c("name", "age", "gender")
4colnames(df) <- x
5

1R> colnames(X)[2] <- "superduper"