try hist(alnlength, prob = TRUE)
moreover I think that you do not need to sample from the Chi-squared to draw its density; you could use dchisq(seq(...), 4)) instead. I hope it helps. Best, Dimitris ---- Dimitris Rizopoulos Ph.D. Student Biostatistical Centre School of Public Health Catholic University of Leuven Address: Kapucijnenvoer 35, Leuven, Belgium Tel: +32/(0)16/336899 Fax: +32/(0)16/337015 Web: http://www.med.kuleuven.be/biostat/ http://www.student.kuleuven.be/~m0390867/dimitris.htm ----- Original Message ----- From: "Albert Vilella" <[EMAIL PROTECTED]> To: <r-help@stat.math.ethz.ch> Sent: Tuesday, December 13, 2005 2:23 PM Subject: [R] superimpose density line over hist > Hi all, > > I'm trying to superimpose a rchisq density line over a histogram > with > something like: > > hist(alnlength) > lines(density(rchisq(length(alnlength), 4)),col="red") > > But the rchisq line won't appear anywhere, > > Anyone knows what I am missing here? > > Thanks in advance, > > Albert. > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html