Christophe
you might find the Brobdingnag package on CRAN helpful here.
I wrote the package partly to teach myself S4; it includes a
vignette that builds the various S4 components from scratch,
in a step-by-step annotated "cookbook".
HTH
rksh
On 8 Feb 2008, at 15:30, [EMAIL PROTECTED] wrote:
> Hi the list.
>
> I try to learn the S4 programming. I find the wiki and several doc.
> But
> I still have few questions...
>
> 1. To define 'representation', we can use two syntax :
> - representation=list(temps = 'numeric',traj = 'matrix')
> - representation(temps = 'numeric',traj = 'matrix')
> Is there any difference ?
> 2. 'validityMethod' check the intialisation of a new object, but not
> the latter
> modifications. Is it possible to set up a validation that check
> every
> modifications ?
> 3. When we use setMethod('initialize',...) does the validityMethod
> become un-used ?
> 4. Is it possible to set up several initialization processes ? One
> that build an objet from a data.frame, one from a matrix...
>
> Thanks
>
> Christophe
>
> ----------------------------------------------------------------
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> Nanterre
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