Sorry, I missed this post.
Maciej Piechotka schrieb: > Well - i tried to write some package dealing with distributions etc. > > If you have something like that: > > instance ... => Distribution (Linear a) a where > rand (Linear f s) g = > let (gf, gt) = genRange g > (v, g') = next g > in (g', f + (fromIntegral v * s) / fromIntegral (gt - gf)) > > (I haven't check it but IMHO it is right implementation) > > Now I have following options: > > - Implement per Int/Int8/... > - Implement IntegerLinear and FractionalLinear separatly That is, what you need is a general division with rounding. But you might more generally want a custom type class with a method that selects an element from a set for given parameters gf, gt, v. This way, you could also handle distributions on Enumeration types. You certainly you do not want, say a division operation on Monday, Tuesday, ..., Sunday, but having a probability distribution of weekdays is very reasonable. Btw. you may want to have a look at: http://hackage.haskell.org/package/probability _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
