Thanks Henrik, I'll take it into account.
2014-04-24 12:58 GMT+02:00 Henrik Johansen <henrik.s.johan...@veloxit.no>: > > On 24 Apr 2014, at 11:25 , Sebastian Tleye <stl...@gmail.com> wrote: > > Thanks Markus, I didn't try it but I will! > > > 2014-04-24 11:20 GMT+02:00 Markus Fritsche <mfrits...@reauktion.de>: > >> On 2014-04-24 11:10, Sebastian Tleye wrote: >> >> Hi, >>> >>> I am doing some experiments in Pharo and I need to model Normal and >>> Log-Normal distributions in pharo. >>> Is there any existing package for that? >>> >> >> Hello Sebastion, >> >> have you tried the "NumericalMethods" Package in the Configuration >> browser? It loads a package "DHB", which includes the class >> DhbNormalDistribution. >> >> >> Best regards, >> Markus >> >> > If the package is anything like the one in VisualWorks (In other words, > LogNormalDistribution a subclass of > ProbabilityDensityWithUnknownDistribution), you probably want to implement > LogNormalDistribution >> distributionValue: aNumber > "Answers the probability of observing a random variable distributed > according to > the receiver with a value lower than or equal to aNumber." > ^aNumber > 0 > ifFalse: [0] > ifTrue: [normalDistribution distributionValue: aNumber ln] > > rather than rely on the supers implementation, if you plan on using it. > > Cheers, > Henry >
