Hi, On Thursday 22 December 2011, meik michalke wrote: > Am Donnerstag, 22. Dezember 2011 10:53:18 schrieb Thomas Friedrichsmeier: > > Perhaps it would make sense to split up the plugin after all? > > that was actually my first idea, but then i thought it's perhaps a bit > confusing to find what you want if there's still a "correlation matrix" > plugin (as long as it's not labelled "(except polyserial)", but that would > be odd ;-)).
not sure, whether that would really be a problem, as "polyserial" would be fairly visible in the "Correlation"-menu. Add cross-links on the plugin help pages, and I think we should be fine. > then, if we were to split things, i think it would be much clearer to offer > product-moment vs. ranks, but that wouldn't change these dialog issues at > all. True. Of course we could also split into three categories: - Product-moment - All ranks - Mixed interval / ordinal data (polyserial) The first two would look fairly similar, of course. > in the current plugin, an alternative could be to check > the number of levels (after as.factor()) and consider only variables that > remain below a sane threshold. that number could be made configurable in a > spinbox. how about that? Well, that would be an interesting alternative. But I would think that two separate varslots are still the safest, and clearest option, here. So, IMO that would make sense as an addition, but not as a replacement. Either way, that means one or more additional UI-elements, and potentially additonal R code for the polyserial correlation. Add to that, the output format is not ideally suited for polyserial. The more I think about it, the more I believe polyserial should go into a separate plugin. Regards Thomas
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