superimpose density line over hist
Le 14.12.2005 11:54, Martin Maechler a ??crit :
"Romain" == Romain Francois <francoisromain at free.fr>
on Tue, 13 Dec 2005 15:40:59 +0100 writes:
........ Romain> A few comments : Romain> - your code should be reproductible, otherwise it is useless. (that Romain> recommandation is on the posting guide) Romain> - that question is a top ten question on that list, go to the archive Romain> and you will find answers. (also posting guide) Romain> BTW, it should be a FAQ and what about an example of overlaying in hist Romain> help page ? What about the following one --- do also note the comments though!
Great !
set.seed(14) x <- rchisq(100, df = 4) ## Comparing data with a model distribution should be done with qqplot()! qqplot(x, qchisq(ppoints(x), df = 4)); abline(0,1, col = 2, lty = 2) ## if you really insist on using hist() ... : hist(x, prob = TRUE, ylim = c(0, 0.2)) curve(dchisq(x, df = 4), col = 2, lty = 2, lwd = 2, add = TRUE)
I agree with you about qqplot, but a lot of people like that kind of hist-density overlay ...
visit the R Graph Gallery : http://addictedtor.free.fr/graphiques mixmod 1.7 is released : http://www-math.univ-fcomte.fr/mixmod/index.php +---------------------------------------------------------------+ | Romain FRANCOIS - http://francoisromain.free.fr | | Doctorant INRIA Futurs / EDF | +---------------------------------------------------------------+