st: add diagonal line to graph

["Falko Juessen" <F.Juessen@wiso.uni-dortmund.de>]

Hello all,

I want do add a diagonal line to a scatterplot (the main diagonal).
I know how to add a horizontal or vertical line ( - help
added_line_options - ) but I don't know how to add a diagonal line.

Any suggestions?

Thanks in advance,
Falko.
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/