st: graph over

[Caleb Southworth <caleb@uoregon.edu>]

I would like to graph ESL percentages for 11 schools on one graph.

This -tsline iPesl if ossi_schl==1, by(schl_id)- gives me 11 graphs 
with one line each. I'm stumbling over which form of -by- will put all 
11 lines on one graph.

Thanks!

Caleb Southworth
Associate Professor
Univ. of Oregon Sociology
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