Hi,
i kind of asked this question a week and a half ago but i got no responce
so i will try again..
root vers: 3.05/07
To what accuracy can i use the poisson function?
I do:
poiss1=new TF1("poiss1","TMath::Poisson(x,[1])",0,99);
float x0=3;
poiss1->SetParameter(1,x0);
poiss1.Integral(0,99)
>>9.82143583403792597e-01
float x0=0.3;
poiss1->SetParameter(1,x0);
poiss1.Integral(0,99)
>>5.85493726744197751e-01
..i guess the first case is accurate to at least a few percent? ..how
about the second case? ..what is the lower limit to which i can set x0 and
still get a reasonable answer?
cheers,
Dan.
--
CMS-Bristol
http://cern.ch/dan.holmes
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