how to remove multiple columns in r dataframe?

Question

I am trying to remove some columns in a dataframe. I want to know why it worked for a single column but not with multible columns e.g. this works

album2[,5]         


        

Answer 1

Basic subsetting:

album2 <- album2[, -5] #delete column 5
album2 <- album2[, -c(5:7)] # delete columns 5 through 7