Hello Joris,
Thank worked perfectly. My main concern was that I was creating multiple
methods which may have the same name but different signature. Just over
thinking things I guess but I appreciate your time answering my question.
Glenn
> On Mar 10, 2016, at 8:13 AM, Joris Meys <joris.m...@ugent.be> wrote:
>
> Hi Glenn,
>
> that is actually as easy as defining a generic and defining a method for each
> class to extract the slot. I do this literally in every package I write.
>
> setGeneric('duration', function(x, ...) standardGeneric('duration')
>
> setMethod('duration', signature = 'MBSCashFlow', function(x) { x@Duration})
> setMethod('duration', signature = 'REMICCashFlow', function(x) {x@Duration})
> etc...
>
> I suggest you take a close look at Hadley Wickham's books 'Advanced R' and
> 'R packages', both freely available online.
>
> This is the relevant section of the first book :
> http://adv-r.had.co.nz/OO-essentials.html
> <http://adv-r.had.co.nz/OO-essentials.html>
> This is the other book : http://r-pkgs.had.co.nz/ <http://r-pkgs.had.co.nz/>
>
> Cheers
> Joris
>
> On Thu, Mar 10, 2016 at 3:05 PM, Glenn Schultz <glennmschu...@me.com
> <mailto:glennmschu...@me.com>> wrote:
> All,
>
> I have a package with to S4 classes (MBSCashFlow, REMICCashFlow and
> BondCashFlow) all of which contain the slot Duration. I would like have an
> accessor Duration that would work on multiple signatures. Is this possible?
> I have checked my books, help, BioConductor tutorials and it appears that
> this is not possible. Has anyone ever run into this situation?
>
> Best Glenn
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>
>
> --
> Joris Meys
> Statistical consultant
>
> Ghent University
> Faculty of Bioscience Engineering
> Department of Mathematical Modelling, Statistics and Bio-Informatics
>
> tel : +32 9 264 59 87
> joris.m...@ugent.be
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