>>>>> "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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