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Re: st: scatter with aweight - consistent sizing across subsets of observations


From   Friedrich Huebler <fhuebler@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: scatter with aweight - consistent sizing across subsets of observations
Date   Thu, 26 Mar 2009 13:26:56 -0400

Dan,

You can find the solution to your problem in this post:

http://www.stata.com/statalist/archive/2008-08/msg00987.html

The example uses overlaid scatterplots but the principle applies to
plots that are drawn separately. Try the code in the post and add one
new command at the end:

. twoway scatter y x [w=weight], by(group) name(D) legend(off)

A more complicated example is shown here:

http://www.stata.com/statalist/archive/2008-08/msg00982.html

Friedrich

On Thu, Mar 26, 2009 at 12:22 PM, Dan Weitzenfeld
<dan.weitzenfeld@emsense.com> wrote:
> Hi All,
> I am confused as to how exactly Stata determines what will be the
> largest and smallest marker size when using -scatter- with aweights.
> My goal is to create a series of aweighted scatterplots, each one on a
> subset of my data, with the relative marker sizing consistent across
> plots.  That is, if a point in my first graph and a point in my second
> graph are both weighted 100, I'd like them to be the same size,
> regardless of what other points are plotted on each.
>
> My idea for how to do this is to create two fake datapoints, one equal
> to the universal minimum and one equal to the universal maximum of the
> weights, and to include these fake datapoints in each plot.  Since I
> am copying the graphs into PowerPoint and ungrouping them anyway, I
> can just delete these two fake points.
>
> Is there any reason this should not work?
> Is there a simpler way?
>
> Thanks in advance,
> Dan

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