HP Forum Archive 21

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wp34s binomial bug Message #1 Posted by Andrew Nikitin on 22 Sept 2013, 1:11 p.m. 0.5 STO J 2 STO K 2 h PROB Binom Gives "Domain error" instead of 1. Binom_u also gives incorrect result.

Re: wp34s binomial bug Message #2 Posted by Dieter on 22 Sept 2013, 2:02 p.m., in response to message #1 by Andrew Nikitin First of all: which firmware version do you refer to? I get the following results with v3.2 3405. Just to be sure: "Binom"  evaluates the lower CDF, i.e. the sum of all probabilities from k = 0...X "Binomu" evaluates the upper CDF, i.e. the sum of all probabilities from k = X...n "Binomp" evaluates the PDF, i.e. the single probability for k = X. All this works fine here: 0,5 STO J 2 STO K   0 Binomp => pdf(0) = 0,25 1 Binomp => pdf(1) = 0,5 2 Binomp => pdf(2) = 0,25   0 Binom => lower cdf(0) = 0,25 (= pdf(0)) 1 Binom => lower cdf(1) = 0,75 (= pdf(0) + pdf(1))  2 Binom => lower cdf(2) = 1 (= pdf(0) + pdf(1) + pdf(2))   0 Binomu => upper cdf(0) = 1 (= pdf(0) + pdf(1) + pdf(2)) 1 Binomu => upper cdf(1) = 0,75 (= pdf(1) + pdf(2)) 2 Binomu => upper cdf(2) = 0,25 (= pdf(2)) What do you get? Dieter Edited: 22 Sept 2013, 2:34 p.m.

Re: wp34s binomial bug Message #3 Posted by Miguel Toro on 22 Sept 2013, 2:38 p.m., in response to message #2 by Dieter Hi, I also checked with mine: Version 3.2 3450 Results: 0 Binom => 0,25 1 Binom => 0,75 2 Binom => Domain Error Cheers, Miguel

Re: wp34s binomial bug Message #4 Posted by Andrew Nikitin on 22 Sept 2013, 3:18 p.m., in response to message #2 by Dieter I discovered it on actual unit, which I do not have with me, but tried it with latest build in emulator (3450) before posting. I get Domain error on Binom(2) everything else works like your example.

Re: wp34s binomial bug Message #5 Posted by Paul Dale on 22 Sept 2013, 5:20 p.m., in response to message #1 by Andrew Nikitin Bug fixed. - Pauli

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