Thanks, Ken.
1. How can I find S4 methods for a given function given class(es)
of objects? The 'showMethods' function lists available generics for a
given function; "showMethods('%*%')" just produced for me a list of 52
different signatures for "%*%". However, I don't know how to find the
functions with methods for a particular class. The 'methods' function
will produce either S3 methods for a given function or S3 functions for
a given class. It would help me if the 'methods' help page included
"See Also" and "Examples" for S4 classes also, but it doesn't.
2. How can I find source code for S4 methods? I tried
"dumpMethods('%*%', 'mmult.R')" and got an apparently empty file of 0
KB. Then I tried 'dumpMethod("%*%", c(x="TsparseMatrix", y="ANY"))' and
got a file with the following:
setMethod("%*%", structure(c("TsparseMatrix", "ANY"), .Names = c("x", "y")),
NULL
)
Thanks again for your reply regarding "%*%".
Spencer Graves
knoblauch wrote:
> Joe Cainey <jcainey <at> gmail.com> writes:
>
>> Is it possible to supply a new method for the %*% operator?
>>
> clipped
>
>> I've tried to do the same thing with %*%:
>>
>> "%*%.ad" <- function(a,b)
>> {
>> # further code here
>> }
>> However this doesn't work; the new method is never called and the standard
>> %*% operator is used instead. I've had a look at the documentation and it
>> appears to be because the %*% operator is not part of the "Math", "Ops",
>> "Summary" or "Complex" groups. I was wondering if anybody knew of a
>> work-around for this?
>>
> According to the help page for %*%, it is S4 generic but not S3, so
> you might make further progress using S4 methods.
>
>
>> Thanks,
>>
>> Joe Cainey
>>
>>
> best,
>
> Ken
>
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