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st: RE: Combined graphs that overlay
Although it is not documented (to my knowledge), you can add additional
twoway plots to an existing twoway plot (or something that has been
built with a twoway plot, even if you did not know it at the time, such
as -histogram-) using -graph addplot-. This does not really give you any
more functionality than the -addplot()- option, but you can add the
extra plot(s) later (even adding them to a saved graph) without needing
to start again from scratch, e.g.
hist price, percent
graph addplot scatter mpg price
graph addplot scatter turn price, legend(on row(1)) ytitle("")
You can also use -graph describe- to obtain the details of named/saved
graphs which can then be recreated in an overlaid plot (although this
would probably require some care with options in particular).
I can't see any reason why some kind of -graph overlay- subcommand could
not be created for overlaying named/saved twoway plots.
[mailto:firstname.lastname@example.org] On Behalf Of Allan Reese
Sent: 05 May 2006 12:35
Subject: st: Combined graphs that overlay
I've tried a couple of times to overlay different types of graph, and
not come up with a satisfactory solution. The low level commands of
Stata 7 could be programmed to do this, but "graph combine" allows only
for graphs to butt against each other. One example would be to place
pies or barcharts at X-Y positions to make a simple map.
a) Is there an obvious solution I've overlooked?
b) Do other users see a general need?
c) Could it be implemented as an option to combine? Maybe: at(graphno r
c xscale yscale) where r and c refer to absolute position in the
plotting area (see help gph). Eg
graph combine gr1 gr2 gr3, at(1 23063 0 .5 1) at(2 23063 16001 .5 1)
at(3 11531 20001 .1 .1)
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