st: Producing e a two phase single-case graph

[Dan Brossart <brossart@tamu.edu>]

Dear All,

I am trying to generate a graph for single-case data (20 time points 
total) where the baseline has 10 occasions of measurement and the 
treatment phase has 10 occasions of measurement. I need to be able to 
graph the baseline and treatment as a single graph with a vertical line 
separating the two phases. In each phase I need to have a line 
connecting each data point (but not from phase 1 to phase 2). I also 
need the ability to add a regression line to each phase - each phase 
gets its own line, independent of the other phase regression line.

I've looked through Mitchell's "A Visual Guide to Stata Graphics" 3rd 
Ed., but there isn't an example like this and so far I haven't found 
anything like this in the archives. My efforts to use twoway have so far 
failed to produce anything close. Using twoway with xrescale and a by 
statement gives me two separate graphs and I really want to do this in a 
single graph. Ideas?

Thanks,

Dan
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