[R] Warning trying to plot -log(log(survival)) (John Sorkin)

Terry Therneau therneau at mayo.edu
Tue May 12 15:00:49 CEST 2009

  Nothing about the data set you posted should give issues in any version of the 
package.  The "points <=0" usually arises when the survival curve drops to zero, 
and so log(-log(0)) is being trimmed off the graph by the plot command.  This is 
what should happen.  As Thomas pointed out to you earlier, log-log survival 
curves are not that useful and there are now much better methods.
   I suspect that the data set you posted and the data set giving the warning 
are not the same.
   	Terry T.

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