[R] R 2.5.1 - Rscript through tee
edd at debian.org
Mon Aug 27 16:02:31 CEST 2007
On 26 August 2007 at 22:47, François Pinard wrote:
| I met a little problem for which someone might have a solution. Let's
| say I have an executable file (named "pp.R") with this contents:
| a <- 1
| a <- 2
| If I execute "./pp.R" at the shell prompt, the output shows the timely
| progress of the script as expected. If I use "./pp.R | tee OUT"
| instead, the output seems buffered and I see it all at once at the end.
| The problem does not come from the "tee" program, as if I use this
| (echo a; sleep 5; echo b) | tee OUT
| the output is timely, not batched.
| So, is there a way to tell R (or Rscript) that standard output should be
| unbuffered, even if it is not directly connected to a terminal?
Use explicit print statements, e.g. print(a <- 1)
Also, you still have little as an alternate, at least on Unix . Littler5D
actually won't show anything unless you explicitly call cat() or print(), but
then it does:
qa-v40z1:~/svn/hancock/app/aggposview> cat /tmp/fp2.r
cat(a <- 1, "\n")
cat(a <- 2, "\n")
foo:~> /tmp/fp2.r | tee /tmp/fp2.r.out
Littler is an 'all-in' binary and starts and runs demonstrably faster than
 And despite the rather petty refusal of Rscript's main author to a least
give a reference to littler in Rscript's documentation, let alone credit as
'we were there first', the fact remains that littler became available in Sep
2006 whereas Rscript was not released until R 2.5.0 a good six month
later. Oh well.
| In case useful, here is local R information:
| platform = x86_64-unknown-linux-gnu
| arch = x86_64
| os = linux-gnu
| system = x86_64, linux-gnu
| status =
| major = 2
| minor = 5.1
| year = 2007
| month = 06
| day = 27
| svn rev = 42083
| language = R
| version.string = R version 2.5.1 (2007-06-27)
| Search Path:
| .GlobalEnv, package:stats, package:utils, package:datasets, fp.etc, package:graphics, package:grDevices, package:methods, Autoloads, package:base
| François Pinard http://pinard.progiciels-bpi.ca
| R-help at stat.math.ethz.ch mailing list
| PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
| and provide commented, minimal, self-contained, reproducible code.
Three out of two people have difficulties with fractions.
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