Read and rbind multiple csv files

Question

I have a series of csv files (one per anum) with the same column headers and different number of rows. Originally I was reading them in and merging them like so;

Answer 1

If you're looking for speed, then try this:

require(data.table) ## 1.9.2 or 1.9.3
ans = rbindlist(lapply(filenames, fread))