R help - Nov 2010 - Help with Hist

Dear list

I am trying to re-scale a histogram and using hist() but can not seem to 
create a reduced scale where the upper values are not plotted.

What I have is about 100 of which 80 or so are between a value of 0 and 
40 , one or two in the hundreds and an outlier around 2000.

What I would like to do is create an x-scale that shows 5 bins between 
0-100 and then 3/4 bins between 100 and 2000 but I don't need any 
resolution on the above 100 values.

If I use breaks c(0, 20, 40, 60, 80, 100, 200, 500) R gives me an error 
saying that there are values not included, which of course I know but I 
wish to ignore them.

It seems that I am missing something quite simple.

Any help would be appreciated.

Regards
Steve

Hi,

I think you should also give the upper extreme:

x <- c(rnorm(80)+10, 101:110, 2001:2010)
hist(x, breaks=c(0, 20, 40, 60, 80, 100, 200, 500))
Error in hist.default(x, breaks = c(0, 20, 40, 60, 80, 100, 200, 500)) :
   some 'x' not counted; maybe 'breaks' do not span range of
'x'
hist(x, breaks=c(0, 20, 40, 60, 80, 100, 200, 500, 2100))  ## which 
looks horrible, but works, up to you how to cut it

HTH,
Ivan

Le 11/15/2010 15:53, Steve Sidney a ?crit :
> Dear list
>
> I am trying to re-scale a histogram and using hist() but can not seem 
> to create a reduced scale where the upper values are not plotted.
>
> What I have is about 100 of which 80 or so are between a value of 0 
> and 40 , one or two in the hundreds and an outlier around 2000.
>
> What I would like to do is create an x-scale that shows 5 bins between 
> 0-100 and then 3/4 bins between 100 and 2000 but I don't need any 
> resolution on the above 100 values.
>
> If I use breaks c(0, 20, 40, 60, 80, 100, 200, 500) R gives me an 
> error saying that there are values not included, which of course I 
> know but I wish to ignore them.
>
> It seems that I am missing something quite simple.
>
> Any help would be appreciated.
>
> Regards
> Steve
>
> ______________________________________________
> R-help at 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.
>
-- 
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. S?ugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calandra at uni-hamburg.de

**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php

SteveSB wrote:
> 
> What I have is about 100 of which 80 or so are between a value of 0 and 
> 40 , one or two in the hundreds and an outlier around 2000.
> 
> 
Have a look at gap.barplot in package plotrix. Personally, I prefer to use
xlim(x(0,100) in this case and add "one outlier at t=2000" in the
legend.

Dieter


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Steve Sidney <sbsidney <at> mweb.co.za> writes:
> I am trying to re-scale a histogram and using hist() but can not seem to 
> create a reduced scale where the upper values are not plotted.
> 
> What I have is about 100 of which 80 or so are between a value of 0 and 
> 40 , one or two in the hundreds and an outlier around 2000.
> 
> If I use breaks c(0, 20, 40, 60, 80, 100, 200, 500) R gives me an error 
> saying that there are values not included, which of course I know but I 
> wish to ignore them.
  Subset your data first to remove the outlier?

x.trimmed <- x[x<2000]

or

x.trimmed <- subset(x,x<2000) 

?