number of rows each data frame in a list [duplicate]

Question

I have a list of data frames in R. They are created using lapply and read.csv commands. I want to know the number of rows of each data frame in the list. The nrow command does not work for this list. I am not sure may because it is a list. Any idea about counting the number of rows of each data frame in a list?

Answer 1

Lists don't have rows. Use sapply to loop over the list:

sapply(data.frame.list, nrow)

Answer 2

or lapply- the difference is in the output

lapply(data.frame.list, function(x) nrow(x))