[R] files

[Val]

Hi all,

In one folder  I have several files  and  I want
combine/concatenate(rbind) based on some condition .
Here is  the sample of the files in one folder
   test.csv
   test123.csv
   test456.csv
   Adat.csv
   Adat123.csv
   Adat456.csv

I want to create 2  files as follows

test_all  = rbind(test.csv, test123.csv,test456.csv)
Adat_al l= rbind(Adat.csv, Adat123.csv,Adat456.csv)

The actual number of  of files are many and  is there an efficient way
of doing it?

Thank you