[R] Scatterplot Showing All Points

[Duncan Murdoch]

Jari Oksanen wrote:
> Wayne Aldo Gavioli <wgavioli <at> fas.harvard.edu> writes:
>
>   
>> Hello all,
>>
>> I'm trying to graph a scatterplot of a large (5,000 x,y coordinates) of data
>> with the caveat that many of the data points overlap with each other (share the
>> same x AND y coordinates).  In using the usual "plot" command,
>>
>>     
>>> plot(education, xlab="etc", ylab="etc")
>>>       
>> it seems that the overlap of points is not shown in the graph.  Namely, there
>> are 5,000 points that should be plotted, as I mentioned above, but because so
>> many of the points overlap with each other exactly, only about 50-60 points are
>> actually plotted on the graph.  Thus, there's no indication that Point A shares
>> its coordinates with 200 other pieces of data and thus is very common while
>> Point B doesn't share its coordinates with any other pieces of data and thus
>> isn't common at all.  Is there anyway to indicate the frequency of such points
>> on such a graph?  Should I be using a different command than "plot"?
>>
>>
>>     
> One suggestion seems to be still missing: 'sunflowerplot' of base R. May look
> taggy, though, if you have 200 "petals". 
>
> Actually the documentation of sunflowerplot is wrong in botanical sense.
> Sunflowers have composite flowers in capitula, and the things called 'petals' in
> documentation are ligulate, sterile ray-florets (each with vestigial petals
> which are not easily visible in sunflower, but in some other species you may see
> three (occasionally two) teeth). 
>   
Could you please put together a patch that replaces "petals" with 
"ligulate, sterile ray-florets" in appropriate places?

;-)

Duncan Murdoch
> cheers, jari oksanen
>
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