On Fri, Oct 31, 2003 at 02:40:15PM -0500, Marc Belisle wrote: > Howdee, > > One of my student spotted something I can't explain: a probability >1 vs a > normal probability density function.
The integral has to be 1 --- but dnorm doesn't compute that. You were probably looking for pnorm(), and it will give you 0.5 for all those cases (where x==mean) as you'd expect. Hth, Dirk > > dnorm(x=1, mean=1, sd=0.4) > [1] 0.9973557 > > > dnorm(x=1, mean=1, sd=0.39) > [1] 1.022929 > > > dnorm(x=1, mean=1, sd=0.3) > [1] 1.329808 > > > dnorm(x=1, mean=1, sd=0.1) > [1] 3.989423 > > > dnorm(x=1, mean=1, sd=0.01) > [1] 39.89423 > > > dnorm(x=1, mean=1, sd=0.001) > [1] 398.9423 > > Is there a bug with the algorithm? > > Thanks, > > Marc > > ======================== > Marc B?lisle > Professeur adjoint > D?partement de biologie > Universit? de Sherbrooke > 2500 boul. de l'Universit? > Sherbrooke, Qu?bec > J1K 2R1 CANADA > > T?l: +1-819-821-8000 poste 1313 > Fax: +1-819-821-8049 > Courri?l: [EMAIL PROTECTED] > Site Web: > www.usherbrooke.ca/biologie/recherche/ecologie/Belisle/belisle.html > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://www.stat.math.ethz.ch/mailman/listinfo/r-help > -- Those are my principles, and if you don't like them... well, I have others. -- Groucho Marx ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
