On Sun, Feb 26, 2012 at 05:06:42PM +0100, gianni lavaredo wrote:
thanks Hans. It's true your idea improve the speed in the analysis respect a row-by-row loop. Sorry if I ask these questions to better understand and better performening my code: 1) split command in GNU coreutils, $ split -l 1000000 testmem.csv i never use this command. Is it possibile to coding in R or it's an external command?
external. split is - as I wrote - part of GNU coreutils.
do you have some links where i can study this command. Thanks
http://www.gnu.org/software/coreutils/
2) is it possible to work with txt file?
"txt file" is not a well defined concept, such a file could very well be a csv file, see http://en.wikipedia.org/wiki/Comma-separated_values ?read.csv