write.table file="file.txt" help
Kristin Kay Nicodemus wrote:
Hi all,
I have a R script that creates several input files for an analysis
program. It loops through the matrix read into R and picks out
submatrices and then creates a separate output file for each
submatrix. The loop works great, but I am having trouble getting all
the separate output files written.
The line I have is:
write.table(ch1d, file="C:/WINDOWS/Desktop/SNPs/haplo.txt",
row.names=F, col.names=F, append=F, quote=F)
Which works just fine if I just wanted to create a single file from the
loop. However, I need to somehow get it to change the name of the
output file ("haplo.txt") each time it goes through the loop so it
doesn't overwrite each time. In perl, I'd create $n=1 and increment up
each loop, and call the file something like "haplo.txt.$n"
I tried to do something like that but R doesn't recognize the variable
that would be $n in perl (because it's part of the quoted name of the
output file). Adding it after the ending " just gave me an error, as I
thought it would.
I also tried to use system(copy ...) to change the name of the file in
dos, but my knowledge of dos is abysmal, so I was unable to do it.
Any ideas on how to go about doing this would be most appreciated!
Thanks in advance,
KK Nicodemus
Use paste().
for(i in 1:n) {
file <- paste("C:/WINDOWS/Desktop/SNPs/haplo", i, "txt", sep = ".")
cat("Writing data to", file, "\n")
write.table(ch1d, file=file,
row.names=F, col.names=F, append=F, quote=F)
}
-sundar