Talk:Generalized Dirichlet distribution
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The article would become a lot more interesting and informative if the difference with the usual Dirichlet distribution could be clarified. Tomixdf 10:20, 25 August 2007 (UTC)
- Hello Tomixdf. The condition for the GDD to reduce to the DD is stated just after the first displayed equation. I will emphasise it. Do you have any idea what Wong's "two wooden box" experiment means? I sure don't. Best wishes, Robinh 21:43, 25 August 2007 (UTC)
- No, I have no idea what the "two wooden box experiment" is about :-). I'll look into the GDD though, it looks quite interesting. What I actually meant was: in which situations would a GDD perform better than an ordinary DD? A simple, real world example would be nice, IMO. Some plots of samples drawn from GDDs with different parameters would be great, for example. Tomixdf 23:24, 25 August 2007 (UTC)
- Hello again Tomixdf. Unfortunately, the best real world example of GDD being better than the DD is Wong's two wooden box experiment. Which I do not understand (not for lack of trying). I have Wong 1998 right in front of me, open at the right page, which I have been staring at for hours and hours. And I still don't understand it properly. Connor and Mosiman discuss two nice little examples (one of percentages of bone constituents and one of areas of turtle scutes) but these are better discussed on the Neutral vector page, IMO. Let me know if you think this is inappropriate! I'll stick them in when I get a minute. Best wishes, Robinh 21:37, 26 August 2007 (UTC)
- I'm also a bit puzzled by Wong's boxes :-D. But there is some pseudocode to generate samples from GDD, so it should be easy to make some plots showing the different shapes of DD and GDD for different parameter sets. I'll try to look into it one of these days. Tomixdf 18:18, 29 August 2007 (UTC)
- Hello again Tomixdf. Unfortunately, the best real world example of GDD being better than the DD is Wong's two wooden box experiment. Which I do not understand (not for lack of trying). I have Wong 1998 right in front of me, open at the right page, which I have been staring at for hours and hours. And I still don't understand it properly. Connor and Mosiman discuss two nice little examples (one of percentages of bone constituents and one of areas of turtle scutes) but these are better discussed on the Neutral vector page, IMO. Let me know if you think this is inappropriate! I'll stick them in when I get a minute. Best wishes, Robinh 21:37, 26 August 2007 (UTC)
- No, I have no idea what the "two wooden box experiment" is about :-). I'll look into the GDD though, it looks quite interesting. What I actually meant was: in which situations would a GDD perform better than an ordinary DD? A simple, real world example would be nice, IMO. Some plots of samples drawn from GDDs with different parameters would be great, for example. Tomixdf 23:24, 25 August 2007 (UTC)
