#14008: Some R packages no longer can be installed
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Reporter: charpent | Owner: tbd
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-5.7
Component: packages | Resolution:
Keywords: r-project | Work issues:
Report Upstream: N/A | Reviewers:
Authors: Emmanuel Charpentier | Merged in:
Dependencies: | Stopgaps:
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Comment (by charpent):
Replying to [comment:15 dimpase]:
> Could you provide examples related to R packages which this is supposed
to fix? (Even better, doctests, perhaps optional)
An example is easy (but dangerous, see below), a doctest is not :
installing an R package is '''supposed''' to have a '''permanent''' effect
on the state of the installed system (an installed package stays installed
between sessions). This, as far as I can tell, cannot be checked in a
doctest.
Furthermore, a newly installed R package needs a restart of Sage to be
usable (or so says the final message given by r.install.packages()).
An example is trivial : take example given for r.install_package(, which
installs the R aami package). But :
* the side effect is to have the R package aami permanently installed,
which is not necessarily a Good Thing(TM).
* if aami is already installed in the user's system, the example will
fail.
One could implement the following pseudocode :
{{{
if (aami is installed) {
uninstall it
demonstrate the uninstallation
reinstall it
demonstrate the installation
} else {
install it
demonstrate the installation
uninstall it
demonstrate the uninstallation
}
}}}
But this might be a bit contrived for an example, no ?
An example which demonstrates the usefulness of this newer R version is to
install the R package coda, I couldn't do that with sage 5.6 and R 2.14.0,
I can do that with sage 5.6 and R 2.15.2.
HTH,
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14008#comment:16>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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