[R] Identifying points in a plot that have duplicate values

[David Barron]

Have a look at ?sunflowerplot, which not only produces a scatterplot
showing multiple points with the same coordinates using special
symbols, but will also produce a list showing the number of points at
each coordinate as well.

On 05/03/07, David Lloyd <DavidLloyd at mail2lloyd.com> wrote:
> I have code like this: -
>
> #-----------------------------------------------------------------------
> ------------------------------------------------------
>
> x=scan()
> 0 0 0 0 0 1 2 3 4
>
> y=scan()
> 1 1 1 2 2 1 3 4 5
>
> plot(x,y)
>
> identify(0,1,3) #Allows me to select manually to identify co-ordinate
> (0,1) as being duplicated 3 times
> identify(0,2,2) #Allows me to select manually to identify co-ordinate
> (0,2) as being duplicated 2 times
> #-----------------------------------------------------------------------
> ------------------------------------------------------
>
> Is there not a way I can automatically display if points are duplicated
> and by how many times?
>
> I thought if I 'jittered' the points ever so slightly I could get an
> idea of how many duplicates there are but with >100 points the graph
> looks very messy.
>
> Regards
> DaveL
>
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-- 
=================================
David Barron
Said Business School
University of Oxford
Park End Street
Oxford OX1 1HP