[R] Changing Y axis in R

David Winsemius dwinsemius at comcast.net
Thu Jul 21 16:09:43 CEST 2011

On Jul 21, 2011, at 9:42 AM, SamiC wrote:

> Hi,
> So I am trying to plot my results of a model.  what i have is the  
> majority
> of the data between the values of 0 and 30, then one outlier at 80 and
> another at 130.  the model plots a nice line through the data  
> between 0 to
> 30, however given the outliers you cant seen this unless you change  
> the y
> axis using ylim=c(0,30) but then you can only see the data points in  
> this
> range.  What I would like to do is plot a y axis with a multiple  
> scale, so
> if i have 10 equally spaced ticks, 0 to 8 would be the data between  
> 0 and
> 30, and then tick 9 would be 80 and tick 10 130, so that the two  
> outliers
> would be show in the graph.  I think what i have seen is a graph  
> with the
> axis on one scale, then a squiggly line to another scale, and a  
> squiggly
> like to a third scale.

I seem to remember a post from Sarkar that there is no provision for  
broken axes in lattice, so you will perhaps need to stay with base  
graphics. The places to look for this sort of request are in plotrix  
and TeachingDemos packages. I seem to remember such a question in the  
past, so if that isn't immediately effective  (actually it was when I  
just checked so I am leaving it as an exercise for the poster), then  
do some searching in the archives. And I see you are on posting from  
Nabble. Nabble is not a particularly good place to do searches. Use  
Baron's site, or  Rseek, or sos::findFn, or Markmail or gmane. They  
are all bette for searching. You might want to read the Posting Guide  


David Winsemius, MD
West Hartford, CT

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