[R] bar plot/ histogram

[Greg Snow]

You can still use hist, just provide your own breaks:

mydata <- sample(1:10, 100, TRUE, 10:1)
br <- c( 0.5:4.5, 10.5 )
hist(mydata, breaks=br, xaxt='n')
axis(1, at= c(1:4, mean(5:10)), c( 1:4, '5-10'))
box(bty='l')

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 phoebe kong
> Sent: Wednesday, February 11, 2009 11:11 AM
> To: r-help
> Subject: [R] bar plot/ histogram
> 
> Hi all,
> 
> I would like to construct plot of the distribution of N, where N range
> from 1 to 10. I couldn't just use the hist(), as I want the categories
> for the bars are: 1, 2, 3, 4, >=5. So this will be a bar plot with 5
> bars, and the height of the bar will be the frequency of N. (eg bar#1
> will be the frequency of N=1, bar #2 will be frequency of N=2, and
> bar#5 will be the frequency of N>=5).
> 
> Thanks in advance for your help!
> 
> SY
> 
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