I've run into the following problem, which sometimes happens when running the code in R under Rserve. So far I was unable to replicate this.
I first create a PDF with
pdf(file=paste(output.dir, "/dates_",name,".pdf",sep=""),width=6.25,height=9,title="Breakdown Dates:")
and then plot the data:
plot(time, data1, xlab="", ylab="")
Most of the time it works, when it fails I get the error:
cannot open file '', reason No such file or directory
I've rerun this and debugged multiple times and all is working fine. However, sometimes in production it fails. Currently I suspect either the RServe or the file system perhaps.
Any ideas would be welcome.
file.path
is more portable across file systems than paste
, as it automatically sets appropriate directory separators. Use paste
(or paste0
) for just the filename:
pdf(file=file.path(output.dir, paste0("dates_", name, ".pdf")),
width=6.25,height=9,title="Breakdown Dates:")
来源:https://stackoverflow.com/questions/16798605/cannot-open-file-reason-no-such-file-or-directory