In building a function for a package, I'd like to set the defaults in a control
list,
e.g.,
makeg<-function(parameters, eps = 1.0e-7, control=list(showwork=TRUE,
rubbish=1.0e+101)){
etc.
}
This does not provide showwork or rubbish within the function if control() is
not fully
specified. Copying others, I've previously set the control defaults within the
function
then matched names, and that certainly works. I'm happy to keep using that
approach, but
would like to have a pointer to good practice for doing this (I'm prepared to
write or
help write a short tutorial if none exists).
I can understand that trying to do the default replacement at a second or
greater level
could give problems. A search through the language definition and some googling
didn't
show up any obvious warning about this, but I'm sure there are some comments
somewhere.
Can anyone suggest some URLs?
One gets used to the nicety of being able to specify defaults and forgets that
even R has
some limits.
JN
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