All good then.
Thanks.
Renaud
2013/3/19 Martin Maechler <maech...@stat.math.ethz.ch>
> >>>>> "RG" == Renaud Gaujoux <ren...@mancala.cbio.uct.ac.za>
> >>>>> on Sun, 17 Mar 2013 10:38:44 +0200 writes:
>
> RG> Late report is better than never isn't it? :)
> >> > Well,... you forgot to show the error (and the
> >> traceback) :
> >>
>
> RG> Apologies, I usually include them (and sessionInfo ...).
>
>
> >>
> >> > Note that this problem is somewhat dependent on the use
> >> of the > infamous "matrix" class {not properly defined as
> >> a class in S3, > as it may or may not have dimnames, and
> >> then tried to be made S4 > compatible "as well as
> >> possible" in the methods package, see
> >>
>
> RG> Ok. What I want to do is to define a class in my
> RG> namespace that gather some matrix-like classes so that I
> RG> can define a set of common functions for them.
> RG> Initially I want matrix and ExpressionSet objects, and
> RG> possibly add array objects later. Union classes seem to
> RG> be exactly the way to go, but maybe there is an
> RG> alternative?
>
> There's really *no* problem with class unions.
> They work fine and nicely... we also use them in the Matrix
> package (part of the R distro).
>
> The problem you've reported is only a propblem of removeClass().
>
> Martin
>
>
>
> >>
> >> > Of course, I could not have thought of a realistic
> >> situation > where this was a problem, but then you
> >> exemplify one :
> >>
> >> >> Hadley, this is problematic for devtools, because
> >> load_all tries to cleanup >> S4 classes when an error
> >> occurs when loading a development package and >> crashes
> >> with no hint on the original error.
> >>
> >>
> RG> I guess a quick fix for devtools, would be to wrap the
> RG> cleanup procedure into a try or tryCatch (Hadley?).
>
>
> RG> Thanks, Renaud
>
>
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