On 26 September 2006 at 22:17, Gabor Grothendieck wrote: | The real problem is that one wants to pipe the data in, not the | R source. The idea is that one successively transforms the | data in successive elements of the pipeline.
But that is what our filesize example does:: | On 9/26/06, Duncan Murdoch <[EMAIL PROTECTED]> wrote: | > On 9/26/2006 1:04 PM, Jeffrey Horner wrote: [...] | > > But unlike bc(1), GNU R has a vast number of statistical | > > functions. For example, we can quickly compute a summary() and show | > > a stem-and-leaf plot for file sizes in a given directory via | > > | > > $ ls -l /boot | awk '!/^total/ {print $5}' | \ | > > r -e 'fsizes <- as.integer(readLines()); | > > print(summary(fsizes)); stem(fsizes)' | > > Min. 1st Qu. Median Mean 3rd Qu. Max. | > > 13 512 110100 486900 768400 4735000 | > > Loading required package: grDevices | > > | > > The decimal point is 6 digit(s) to the right of the | | > > | > > 0 | 00000000000000000011112223 | > > 0 | 5557778899 | > > 1 | 112233 | > > 1 | 5 | > > 2 | | > > 2 | | > > 3 | | > > 3 | | > > 4 | | > > 4 | 7 Data to be processed on stdin, command via -e 'some long expression'. To make it simpler, here is a somewhat useless example of r piping into r (which I've indented for readability): $ r -e 'set.seed(42); sapply(rnorm(5),function(x) cat(x,"\n"))' | \ r -e 'cat(sum(abs(as.numeric(readLines()))), "\n")' 3.335916 Isn't that something where, to quote you, "one wants to pipe the data in, not the R source" ? Dirk -- Hell, there are no rules here - we're trying to accomplish something. -- Thomas A. Edison ______________________________________________ R-help@stat.math.ethz.ch 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.