Dnorm isn't the probability - it's the y-value on the density function. Try plotting it - it makes a nice normal plot. See ?dnorm for definition.
Bob -----Original Message----- From: Marc Belisle [mailto:[EMAIL PROTECTED] Sent: Friday, October 31, 2003 2:40 PM To: R-Help Subject: [R] dnorm() lead to a probability >1 Howdee, One of my student spotted something I can't explain: a probability >1 vs a normal probability density function. > 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 [[alternative HTML version deleted]] ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
