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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