[R] histogram for integer data

[Don MacQueen]

You might consider something based on the concept of:

   y <- table( x)
   plot( as.numeric(names(y)) , y, type='h')

-Don

At 2:59 PM -0400 3/27/08, <Erwann.Rogard at sanofi-aventis.com> wrote:
>hi,
>
>library(lattice)
>x<-c(-1,-1,-1,0,0,0,0,1,1,2)
>rng<-range(x)
>histogram(x,endpoints=c(rng[1]-0.5,rng[2]+0.5),nint=length(unique(x)))
>
>instead of contiguous bins, i'd like spaces between them to indicate
>that the data is discrete, or even better, line segments positioned at
>integer values.
>i know how to do this with plot, but i need it with histogram, so that
>in more complicated contexts i can use histogram(~x| f1 * f2....)
>
>thanks!
>
>
>
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>
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-- 
--------------------------------------
Don MacQueen
Environmental Protection Department
Lawrence Livermore National Laboratory
Livermore, CA, USA
925-423-1062