[R] how to plot the histogram and the curve in the same graph

[Greg Snow]

It is not clear what curve you want to plot, but this code may help get you started (the final plot will probably need the x and y limits expanded and maybe other options changed):

x <- rnorm(100, rep( c(100,105), c(75,25)), 2 )

hist(x, probability=TRUE)
lines( density(x), col='green' )
curve( dnorm(x, mean=mean(x), sd=sd(x)), col='blue', add=TRUE )

see the help for hist, lines, and curve for details.

Hope this helps,

--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of leo_wa
> Sent: Monday, October 20, 2008 8:47 PM
> To: r-help at r-project.org
> Subject: [R] how to plot the histogram and the curve in the same graph
>
>
> i want to plot the histogram and the curve in the same graph.if i have
> a set
> of data ,i plot the histogram and also want to see what distribution it
> was.So i want to plot the curve to know what distribution it like.
> --
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> histogram-and-the-curve-in--the-same-graph-tp20082506p20082506.html
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