Soren,
When I had an almost identical problem last
year. I also wanted to use Rraphviz but only if
people had it.
Kurt Hornik suggested that I replace a direct
call to the function, foo, that uses Rgraphviz
with
if(require("Rgraphviz")) foo()
Bill
At 10:23 PM +0200 7/12/08, Søren Højsgaard wrote:
Dear List,
I use Rgraphviz for display of graphs in some
packages. Since Rgraphviz is no longer on CRAN
it needs to be installed from Bioconductor and
that is fine, but I have trouble figureing out
the following: I create a plot method which - if
Rgraphviz is installed - uses Rgraphviz for
displaying and otherwise does nothing. This is
implemented as:
if (!("package:Rgraphviz" %in% search())){
if("Rgraphviz" %in% installed.packages()){
require(Rgraphviz)
} else {
cat("The Rgraphviz package (from
Bioconductor) must be installed to display the
models\n")
return()
}
}
... else go on and do the plotting...
When I run rcmd check packagename (on Windows XP, using R.2.7.1) I get
* checking for unstated dependencies in R code ... WARNING
'library' or 'require' calls not declared from:
Rgraphviz
See the information on DESCRIPTION files in the chapter 'Creating R
packages' of the 'Writing R Extensions' manual.
I can not state Rgraphviz in the Depends-field
of the DESCRIPTION file because then the package
does not pass the windows checks for going on
CRAN. I can not see any solution from "writing R
extensions", but I apologize if I have
overlooked it. Does anyone have a suggestion on
what to do?
Cheers
Søren
______________________________________________
R-help@r-project.org 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.
--
William Revelle http://personality-project.org/revelle.html
Professor http://personality-project.org/personality.html
Department of Psychology http://www.wcas.northwestern.edu/psych/
Northwestern University http://www.northwestern.edu/
Attend ISSID/ARP:2009 http://issid.org/issid.2009/
______________________________________________
R-help@r-project.org 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.
