Hi, You might want to check out ?system ?read.table and ?subset and also ?sub and maybe ?strsplit
Reading one of the good intro to R documents out there would also help you get started with this fairly straightforward task Beyond that, you did a good job of explaining your problem, but this is one of the cases where knowing your OS would be awfully useful. Sarah On Wed, Jul 7, 2010 at 1:49 PM, jd6688 <jdsignat...@gmail.com> wrote: > > Here are what i am going to accomplish: > > I have 400 files named as xxx.txt. the content of the file looks like the > following: > > name count > > 1. aaa 100 > 2. bbb 2000 > 3. ccc 300 > 4. ddd 3000 > > ........ > more that 1000 rows in each files. > > these are the areas i need help: > 1. how can i only read in the files with the string patterns ggg or fff as > part of the file names? > for instance, I only need the file names with the ggg or fff in it > xxxxx_ggg_yyyyy_1.txt > yyyy_fff_yyyy_xxx.txt > > i don't need to read in the files, such as xxxx_aaa_yyyy.txt > > 2.how cam rename the files: > > for instance: xxxxx_ggg_yyyyy_1.txt======>changed to ggg1a.txt > > > 3.after the files read in, how can i only keep the rows with the aaa and > bbb, everything elses show be removed from the files, but the files still > remain the same file name? > > for instance, in the xxxxx_ggg_yyyyy_1.txt file, it shouls looks like: > name count > > 1. aaa 100 > 2. bbb 2000 > 3. aaa 300 > 4. bbb 400 > > > Thanks so lot, I am very new to R, I am looking forward to any helps from > you. > > -- -- Sarah Goslee http://www.functionaldiversity.org ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
