I find it useful to assign the histogram output to a variable and then
manipulate it myself:

For Example:
x=hist(R, freq=FALSE, breaks=10)
str(x)
x$counts/sum(x$counts)

On Wed, Dec 2, 2009 at 5:52 AM, <guohao.huang@gmail.com> wrote:

> Y-axis in your code is ``Counts'' irrelevant to probabilities.
>
>
>                Guo-Hao Huang
>
>
> --------------------------------------------------
> From: "Trafim" <rdapamoga@gmail.com>
> Sent: Wednesday, December 02, 2009 7:35 PM
> To: <r-help@r-project.org>
> Subject: [R] Histogram probabilities >1 ????!!!
>
> Hi everybody,
>
> well, I definitely don't understand anything.
> Why the hist function with freq=FALSE gives such a strange result???
>
> R <- c(-1.10,  0.79, -1.17, -0.53, -0.26, -0.22,  0.29, -0.26, -0.26,
>  0.39)
> hist(R, freq=FALSE, breaks=10)
>
> Thanks everybody
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
> ______________________________________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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