Re: st: Scatterplot with weighted markers

[Maarten buis <maartenbuis@yahoo.co.uk>]

--- On Tue, 15/2/11, Allan Reese (Cefas) wrote:
> The reason for writing is I've been experimenting with
> weighting symbol size by functions of the sample size
> for each point.  I saw such a plot in a paper and
> thought it gave a very useful impression of what
> confidence you might have in the fitted model (line).
<snip> 
> While you can choose an appropriate ratio between smallest
> and largest symbols, there is currently no way to scale
> all the symbols so the largest do not overlap or to make
> the smallest more visible.

If used such plots for exactly that purpose in my 
dissertation, but used R to create those graphs for because
I could not get the scaling of the symbols right as you
pointed out. When it was time to translate that paper to
Stata I ended up using grey tones to distinguish datapoints
measured with more observations from datapoints measured
with only a few observations. Compare graphs 4.5 and 4.6
of chapter 4 
(<http://www.maartenbuis.nl/dissertation/chap_4.pdf>) 
with the graph on page 9 of <http://www.maartenbuis.nl/presentations/amcis11.pdf>
(the presentation is in Dutch, but the graph is self-
explanatory in this respect.)

-- Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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