[R] Declare a set (list?) of many dataframes or matrices

Hi, I would like to read several datasets and would like to create a set (list? sequence?) of many empty dataframes. How could this be done? How could I declare a set (list? sequence?) of many empty matrices? Thanks, Miao [[alternative HTML version deleted]]

Re: [R] Declare a set (list?) of many dataframes or matrices

Hello, I can't say I understand the question, but if you want a list of empty dfs and a list of empty matrices, the following will do. replicate(10, data.frame()) replicate(10, matrix(NA, nrow = 0, ncol = 0)) Hope this helps, Rui Barradas Em 03-05-2013 16:20, jpm miao escreveu: Hi,

Re: [R] Declare a set (list?) of many dataframes or matrices

Hi, I am not sure about what you meant. lapply(1:5,function(i) data.frame()) [[1]] data frame with 0 columns and 0 rows [[2]] data frame with 0 columns and 0 rows [[3]] data frame with 0 columns and 0 rows [[4]] data frame with 0 columns and 0 rows [[5]] data frame with 0 columns and 0