[R] Appending 4 Digits On A File Name

[Matt Curcio]

Greetings all,
I would like to append a 4 digit number suffix to the names of my
files for later use.  What I am using now only produces 1 or 2 or 3 or
4 digits.

############
for (i in 1:1000) {
   temp <- (kegg [i,])
   temp <- merge (temp, subrichcdt, by="gene")
      file.name <- paste ("kegg.subrichcdt.", i, ".txt", sep="")
      write.table(temp, file=file.name)
}
#######
But I want:
"kegg.subrichcdt.0001.txt"
"kegg.subrichcdt.0002.txt", ...


Any suggestions
M
-- 


Matt Curcio
M: 401-316-5358
E: matt.curcio.ri at gmail.com