[WP34s] Regularized incomplete Beta function
|
05-01-2014, 09:08 PM
Post: #5
|
|||
|
|||
RE: [WP34s] Regularized incomplete Beta function
(05-01-2014 07:17 PM)Dieter Wrote: I just tried the regularized incomplete Beta function \(I\beta\) on the 34s. Looking at appendix I of the PDF manual and the given mathematical definition, the argument x and the two parameters a and b of \(I_x(a, b)\) would have to be entered this way: Hmmh, let me look at p. 233 (of 244): it clearly states the parameters for Iβ with the respective stack levels. When I compare this definition to Wolfram's definition (see here) I'd derive that their b is our z, their a is our y, and their z is our x. Translating their formula (6) I'd expect e.g. Iβ(1, 2, 3) = β(2, 3) = 0.083 333 Check: β(2, 3) = Γ(2) Γ(3) / Γ(2+3) = 1! 2! / 4! = 2/24 = 1/12 q.e.d. This turns out being not the case since Iβ(1, 2, 3) returns a domain error with build 3626. Now let's look whether there's just a permutation error in the parameter sequence of our Iβ:
d:-I |
|||
« Next Oldest | Next Newest »
|
User(s) browsing this thread: 1 Guest(s)