I want to run a piecewise exponential and I am not sure how to STSET the
data set before running STPIECE. How do I let the program know which
variable I want to base the time pieces on?
When I run STREG I do the following: stset timevar (timetrend),
I want to use another variable AGE on which to define the time
pieces...Can I do that? and if so How?
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