On 9/26/2006 1:04 PM, Jeffrey Horner wrote: > What ? > ====== > > littler - Provides hash-bang (#!) capability for R (www.r-project.org) > > > Why ? > ===== > > GNU R, a language and environment for statistical computing and > graphics, provides a wonderful system for 'programming with data' > as well as interactive exploratory analysis, often involving graphs. > > Sometimes, however, simple scripts are desired. While GNU R can > be used in batch mode, and while so-called 'here' documents can be > crafted, a long-standing need for a scripting front-end has often > been expressed by the R Community. > > littler (pronounced 'little R' and written 'r') aims to fill > this need. > > It can be used directly on the command-line just like, say, bc(1): > > > $ echo 'cat(pi^2,"\n")' | r > 9.869604
Is there a technical reason that this couldn't work by modifying the script that invokes R? That would avoid the r/R clash on MacOSX and Windows. In Windows R is R.exe, not a script, so some adjustment would be needed there, but that shouldn't be difficult. Duncan Murdoch > > Equivalently, commands that are to be evaluated can be given on > the command-line > > $ r -e 'cat(pi^2, "\n")' > 9.869604 > > 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 > > > And, last but not least, this (somewhat unwieldy) expression can > be stored in a helper script: > > $ cat examples/fsizes.r > #!/usr/bin/env r > > fsizes <- as.integer(readLines()) > print(summary(fsizes)) > stem(fsizes) > > (where calling /usr/bin/env is a trick from Python which allows one > to forget whether r is installed in /usr/bin/r, /usr/local/bin/r, > ~/bin/r, ...) > > A few examples are provided in the source directories examples/ > and tests/. > > Where ? > ======= > > littler can either be downloaded from > > http://biostat.mc.vanderbilt.edu/LittleR > > accessed by anonymous SVN: > > $ svn co http://littler.googlecode.com/svn/trunk/ littler > > or (soon !) be gotten from Debian mirrors via > > $ agt-get install littler > > littler is known to build and run on Linux and OS X. > > > Who ? > ===== > > Copyright (C) 2006 Jeffrey Horner and Dirk Eddelbuettel > > littler is free software; you can redistribute it and/or modify it > under the terms of the GNU General Public License as published by > the Free Software Foundation; either version 2 of the License, or > (at your option) any later version. > > This program is distributed in the hope that it will be useful, > but WITHOUT ANY WARRANTY; without even the implied warranty of > MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > General Public License for more details. > > You should have received a copy of the GNU General Public > License along with this program; if not, write to the Free > Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, > MA 02111-1307 USA > > Comments are welcome, as are are suggestions, bug fixes, or patches. > > > - Jeffrey Horner <[EMAIL PROTECTED]> > - Dirk Eddelbuettel <[EMAIL PROTECTED]> > > ______________________________________________ > 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. ______________________________________________ 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.