[R] hist(x, ...) with normal distribution curve

[Petr Pikal]

Hi

answered hundered times.

> Dear R people: 
> 
> I would like to superimpose a normal curve on a histogram. 
x<-rnorm(150) 
h<-hist(x,breaks=15) 
xhist<-c(min(h$breaks),h$breaks) 
yhist<-c(0,h$density,0) 
xfit<-seq(min(x),max(x),length=40) 
yfit<-dnorm(xfit,mean=mean(x),sd=sd(x)) 
plot(xhist,yhist,type="s",ylim=c(0,max(yhist,yfit))) 
lines(xfit,yfit) 


Bill 

above is e.g. Bill Simpson's answer from 2001. Found from R-site 
search  ***histogram density normal***.

HTH
Petr


On 25 Sep 2005 at 14:34, Knut Krueger wrote:

> .
> I am looking for a histogram or box plot with the adding  normal
> distribution  curve I think that must be possible, but I am not able
> to find out how to do.
> 
> 
> 
> Regards Knut
> 
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Petr Pikal
petr.pikal at precheza.cz