how to delete rows by a list of rownames
I think that only works because the rows are ordered and have no names: try something more like this: df1 <- data.frame(1:20, 21:40, 31:50) rownames(df1) <- sample(letters, 20) toDrop <- sample(rownames(df1), 5) df1[ !(rownames(df1) %in% toDrop), ] or alternatively toKeep <- sample(rownames(df1), 5) df1[rownames(df1) %in% toKeep, ] Michael
On Sun, Oct 23, 2011 at 9:30 AM, B77S <bps0002 at auburn.edu> wrote:
here is one way df1 <- data.frame(c(1:20), c(21:40), c(31:50)) list1 <- c(3, 6, 20) df2 <- df1[-list1,] hanansela wrote:
Hello I have a list of row names that needs to be deleted from a data frame. How do i do that? one of the columns in the data frame contains the row names as numbers. I can also select by this column (will it be easier?). Thank you
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