[R] hist and normal curve

[Bill Simpson]

On Sat, 13 Oct 2001, Erin Hodgess wrote:

> 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

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