[R] New project: littler for GNU R

[Gabor Grothendieck]

Any plans for Windows?

On 9/26/06, Jeffrey Horner <jeff.horner at vanderbilt.edu> 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
>
>   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 <jeff.horner at vanderbilt.edu>
>     - Dirk Eddelbuettel <edd at debian.org>
>
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>