Mike Miller wrote: >Many thanks for the suggestions. Here is a related question: > >When I do things like this... > >echo "matrix(rnorm(25*2),c(25,2))" | R --slave --no-save > >...I get the desired result except that I would like to suppress the >"[,1]" row and column labels so that only the values go to stdout. What >is the trick to making that work? > > What you ask R to do is
matrix(rnorm(25*2),c(25,2)) which is equivalent to print(matrix(rnorm(25*2),c(25,2))) What you really want to do might be solved by write.table(), e.g. x <- matrix(rnorm(25*2),c(25,2)); write.table(file=stdout(), x, row.names=FALSE, col.names=FALSE); A note of concern: When writing batch scripts like this, be explicit and use the print() statement. A counter example to compare echo "1; 2" | R --slave --no-save and echo "print(1); print(2)" | R --slave --no-save >By the way, I find it useful to have a script in my path that does this: > >#!/bin/sh >echo "$1" | /usr/local/bin/R --slave --no-save > >Suppose that script was called "doR", then one could do things like this >from the Linux/UNIX command line: > ># doR 'sqrt(35.6)' >[1] 5.966574 > ># doR 'runif(1)' >[1] 0.8881654 > >Which I find to be handy for quick arithmetic and even for much more >sophisticated things. I'd like to get rid of the "[1]" though! > > > If you want to be lazy and not use, say, doR 'cat(runif(1),"\n")' above, maybe a simple Unix sed in your shell script can fix that?! /Henrik >Mike > > > ______________________________________________ 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
