Re: [Rd] warning from install.packages()

From: Martin Maechler <maechler_at_stat.math.ethz.ch>
Date: Thu, 03 Jun 2010 16:59:01 +0200

>>>>> "VG" == Vincent Goulet <Vincent.Goulet_at_act.ulaval.ca> >>>>> on Thu, 3 Jun 2010 10:24:21 -0400 writes:

    VG> Le jeu. 3 juin à 09:27, Ben Bolker a écrit :
>> Martin Maechler wrote:

    >>>>>>>> "BB" == Ben Bolker <bolker_at_ufl.edu>
    >>>>>>>> on Wed, 02 Jun 2010 13:45:18 -0400 writes:
    >>> 
    BB> Michael Dewey wrote:
    >>>>> At 13:40 01/06/2010, Ben Bolker wrote:
    >>>>> 
    >>>>>>> On 25/05/10 23:25 PM, "Ben Bolker" <bolker <at> ufl.edu> wrote:
    >>>>>>> Just curious: is there a particular reason why install.packages()
    >>>>>>> gives a warning in normal use when 'lib' is not specified (e.g. argument
    >>>>>>> 'lib' is missing: using '/usr/local/lib/R/site-library' )?
    >>>>> 
    >>>>> As I see it R is saying 'I am doing what you told 
    >>>>> me, but just in case I am checking whether that 
    >>>>> was what you really wanted'. Note that you do not 
    >>>>> get a warning if there was only one place R could 
    >>>>> put it. I would certainly vote for a message if 
    >>>>> people are getting unnecessarily alarmed by the warning.
    >>> 
    BB> But this seems so different from R's general philosophy/behavior
    BB> (inherited from Unix?) that a function that gets correct input and
    BB> executes without error returns silently ...
    >>> 
    >>> That's correct.
    >>> Note however that installing a package is not just a thing
    >>> happening in your R session.
    >>> It will affect all your future R sessions, and possibly even
    >>> other users' who have the same  .libPaths()[1]
    >>> {e.g. the group here does share it}.
    >>> 
    >>> I'd agree to not put a warning but I'd definitely want a message
    >>> aka "note" to the user.
    >>> The *wording* of that note should not be alarming at all, I
    >>> agree, just a note to the user.
    >>> 
    >>> Martin Maechler, ETH Zurich

>>
>> OK, then, how about this as a minimal change?
>>
>> ===================================================================
>> --- packages.R (revision 52192)
>> +++ packages.R (working copy)
>> @@ -534,8 +534,8 @@
>>
>> if(missing(lib) || is.null(lib)) {
>> lib <- .libPaths()[1L]
>> - warning(gettextf("argument 'lib' is missing: using %s", lib),
>> - immediate. = TRUE, domain = NA)
>> + message(gettextf("argument 'lib' is missing: using %s", lib),
>> + domain = NA)
>> }
>>
>> paths <- .find.package(pkgs, lib)
>> Index: packages2.R
>> ===================================================================
>> --- packages2.R (revision 52192)
>> +++ packages2.R (working copy)
>> @@ -193,8 +193,8 @@
>> if(missing(lib) || is.null(lib)) {
>> lib <- .libPaths()[1L]
>> if(length(.libPaths()) > 1L)
>> - warning(gettextf("argument 'lib' is missing: using '%s'", lib),
>> - immediate. = TRUE, domain = NA)
>> + message(gettextf("argument 'lib' is missing: using '%s'", lib),
>> + domain = NA)
>> }
>>
>> ## check for writability by user

    VG> I wholeheartedly support the change discussed here since it is also something that has been worrying my students for some time.

    VG> However, I think saying "argument 'lib' not specified: using '%s'" would be even less alarming. "... is missing" sort of implies the user forgot something.

Yes, thank you Vincent,
I meant some such change when I said

    >>> The *wording* of that note should not be alarming at all, I     >>> agree, just a note to the user.

I'd even change it further, to something like  "Installing package into '%s' (as 'lib' is not specified)"

Martin

    VG> Dr. Vincent Goulet
    VG> Full Professor
    VG> École d'actuariat, Université Laval, Québec 
    VG> vincent.goulet@act.ulaval.ca   http://vgoulet.act.ulaval.ca


>>
>>
>> --
>> Ben Bolker
>> Associate professor, Biology Dep't, Univ. of Florida
>> *** NEW E-MAIL ADDRESSES:
>> *** bbolker_at_gmail.com , bolker_at_math.mcmaster.ca
>> bolker_at_ufl.edu / people.biology.ufl.edu/bolker
>> GPG key: people.biology.ufl.edu/bolker/benbolker-publickey.asc
>>
>> <signature.asc><ATT00001..txt>



R-devel_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-devel Received on Thu 03 Jun 2010 - 15:05:03 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Fri 04 Jun 2010 - 01:10:57 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-devel. Please read the posting guide before posting to the list.

list of date sections of archive