[R] Histogram not plotting correct breaks

Greg Snow Greg.Snow at imail.org
Tue Apr 27 19:39:19 CEST 2010

What do you expect to happen to values that fall exactly on the boundary?  I have seen questions similar to yours that come about because the user expects different from what the computer does.  Look at the 'right' argument to the hist function for a way to change this and see if that helps.

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

> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of burgundy
> Sent: Monday, April 26, 2010 8:04 PM
> To: r-help at r-project.org
> Subject: [R] Histogram not plotting correct breaks
> Hi,
> I'm using the hist function to plot the frequency of 21 variables, but
> it
> keeps starting the x-axis from 0 and adding variables 1 and 2 together
> (all
> other vairables have the correct frequencies). I suspect it adds 1 and
> 2
> together so that 0 can fit in with demarcations at intervals of 5.
> Using
> "xlim=c(1,21)" to specify that i don't want to include 0 and using the
> "breaks" command to specify 21 breaks doesn't help. Any advice?
> Thank you!!
> --
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> not-plotting-correct-breaks-tp2066057p2066057.html
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