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d stpowplot: Power and other curves for the log-rank test
d This command produces power, sample-size, effect-size, and other curves 
d for the log-rank test used in survival analysis.  It uses {cmd:stpower} {cmd:logrank}
d for the computations.
d
d Program by Yulia Marchenko, StataCorp <ymarchenko@stata.com>.
d
d Distribution-Date: 10aug2007
f stpowplot/stpowplot.ado
f stpowplot/stpowplot.sthlp