R help - Mar 2011 - To calculate sample size based on generalized wilcoxon test or Tarone-Ware test

Dear all,

I am trying to calculate sample size for a clinical research, on the basis
of  generalized wilcoxon test or Tarone-Ware test.
It seems SAS can do this job using it "POWER" procedure, but SAS is
not
available to me.
I would be very grateful if you could let me know if any R package or other
tools which could cope with this problem.

Best Regards,

Wang

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