On Wed, 23 Sep 2009, Greg Dropkin wrote:
hi
sorry if this has been discussed before, but I'm wondering why the scaled
Schoenfeld residuals do not follow the defining formula for obtaining them
from the ordinary Schoenfeld residuals, but are instead offset by the
estimated parameter values.
Because their purpose in life is to be smoothed against time to get an estimate
of the parameter as a function of time (plot.cox.zph).
-thomas
Thomas Lumley Assoc. Professor, Biostatistics
tlum...@u.washington.edu University of Washington, Seattle
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