Hello R Folks... Not a technical question, but I need some advice and perspective.
I¹ve got a set of functions I¹m planning to put together into a package. The main hunk of data that gets used by different functions is currently an S3 list. I¹ve been reading about S4 objects, and I see the (numerous) advantages of them. I have seen the recommendation that all new packages be done with S4. Before I get much farther, I need to decide if I will go to S4 for this central hunk of data. My questions are about making the conversion, whether it is worth the trouble and what pitfalls I might encounter. I can easily (re)define my key list as an S4 object. But after that... 1. It seems the the simplest/minimalist approach is to update all the functions so that where I use ³data$element² I replace it with ³d...@slot². Is it really this easy, or have I missed something? Easy or not, this by itself doesn't take advantage of much, except the ability to define subclasses at a later date (maybe that is sufficient reason though). 2. I also see in my reading that I should consider writing accessor functions for my object. What I can't quite see is why I would want to do this, if I can get the contents with "d...@slot"? What am I missing here? 3. At this point, I'm not sure that I would write specific methods for this proposed S4 object. It would not be necessary in the short run. Making it S4 would mainly allow for "future expansion" as they say. If methods are not critical, does it make sense to spend the time making the change? Any perspective and advice would be welcomed. Thanks in advance, Bryan ************* Bryan Hanson Professor of Chemistry & Biochemistry DePauw University, Greencastle IN USA ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
