Re: [R] reading large csv data sets efficiently

http://cran.r-project.org/web/packages/data.table/index.html On Wed, May 22, 2013 at 12:31 PM, ivo welch wrote: > I have a couple of large data sets, on the order of 4GB. they come in .csv > files, with about 50 columns and lots of rows. a couple have weird NA > values, such as "C" and "B", in

[R] reading large csv data sets efficiently

I have a couple of large data sets, on the order of 4GB. they come in .csv files, with about 50 columns and lots of rows. a couple have weird NA values, such as "C" and "B", in numeric columns. I am wondering how good read.csv() is dealing with this stuff on the first pass. d<-(read.csv("t.csv"