This relates to the order of things being done. See ?Startup.
Note that the default packages are not loaded until after the Rprofile
file has been run, and postscript() is in package grDevices, not in
graphics. Using grDevices::postscript will always work.
It looks to me that you are trying to emulate Rscript (or R -f).
On Mon, 4 Aug 2008, Allin Cottrell wrote:
In the context of calling R from another program (namely gretl,
http://gretl.sourceforge.net ) I'm trying to understand the
interactions of the R init file (corresponding to the environment
variable RPROFILE) and the source() function.
I'll illustrate my problem with the following simplified contrast
implemented in the bash shell (with R 2.7.1).
1. Works fine:
[EMAIL PROTECTED]:~/Rfoo$ cat fooProfile1
# nothing here
[EMAIL PROTECTED]:~/Rfoo$ cat doit.1
export RPROFILE="fooProfile1"
R --no-save --no-init-file --no-restore-data --slave <fooSrc
[EMAIL PROTECTED]:~/Rfoo$ cat fooSrc
library(graphics)
postscript("myfile.ps")
[EMAIL PROTECTED]:~/Rfoo$ sh doit.1
(silently produces a well-formed but empty myfile.ps)
2. Doesn't work:
[EMAIL PROTECTED]:~/Rfoo$ cat fooProfile2
source("fooSrc", verbose=TRUE, echo=TRUE)
[EMAIL PROTECTED]:~/Rfoo$ cat doit.2
export RPROFILE="fooProfile2"
R --no-save --no-init-file --no-restore-data --slave
[EMAIL PROTECTED]:~/Rfoo$ cat fooSrc
library(graphics)
postscript("myfile.ps")
[EMAIL PROTECTED]:~/Rfoo$ sh doit.2
'envir' chosen:<environment: R_GlobalEnv>
encoding = "native.enc" chosen
--> parsed 2 expressions; now eval(.)ing them:
eval(expression_nr. 1 )
=================
library(graphics)
curr.fun: symbol library
.. after `expression(library(graphics))'
eval(expression_nr. 2 )
=================
postscript("myfile.ps")
Error in eval.with.vis(expr, envir, enclos) :
could not find function "postscript"
== end of output ==
I'd like to understand why, after loading the graphics library,
the function postscript() is not available in the second case
while it is in the first. (The file fooSrc has the same content
in the two cases: in the first case it's loaded via the shell,
while in the second it's loaded using R's source() function.)
Thanks for any help.
--
Allin Cottrell
Department of Economics
Wake Forest University, NC
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--
Brian D. Ripley, [EMAIL PROTECTED]
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
