Dear Wenxia,
Take a look at this post:

http://www.nabble.com/Histogram-for-grouped-data-in-R-to21624806.html#a21624806


HTH,

Jorge


On Wed, Jan 28, 2009 at 4:50 AM, Wenxia Li <ringingfeeling@gmail.com> wrote:

> Hi all,
>
> I'm a new R user. I have the following information about a data set and how
> to make a histogram?
> data             number of observations
> 0-2                     25
> 2-10                  10
> 10-100             10
> 100-1000          5
>
> I tried barplot(height=...,width=...,...), the output looks right but the
> x-axis is missing. How to fix it?
> Also can I use<hist> to draw it?
>
> Thanks!
>
> WX
>
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