On 10.03.2016 16:48, Daniel Nüst wrote:
Hi Glenn!
On 10/03/16 15:05, Glenn Schultz wrote:
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?
I actually use a similar mechanism to extract values from different S4
classes in my package, and it works quite well. So if I understand you
right, the following code might help you to get closer to want you want:
https://github.com/52North/sos4R/blob/master/R/SOS-methods-accessor.R
I created methods for different signatures, see for example
"sosObservedProperties".
Yes, that's straightforward. But I still wonder if it is at all possible
to use not only different *signatures*, but also different argument
*names* in S4, e.g.:
foo(formula, data, ...)
foo(data, grouping, ...)
Now I'm using a combination of S3 and S4 in my package for this purpose,
and for some other quirks.
Thomas
--
Dr. Thomas Petzoldt
Technische Universitaet Dresden
Faculty of Environmental Sciences
Institute of Hydrobiology
01062 Dresden, Germany
E-Mail: thomas.petzo...@tu-dresden.de
http://tu-dresden.de/Members/thomas.petzoldt
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