Hello,
 
I got error message when applying the plot function to the cox.zph
object to create the Schoenfeld residual plots.
 
 
> plot(zph.revasFit[1])
Error in plot.window(xlim, ylim, log, asp, ...) : 
        need finite 'ylim' values
In addition: Warning messages:
1: NaNs produced in: sqrt(x$var[i, i] * seval) 
2: no non-missing arguments to min; returning Inf in: min(x) 
3: no non-missing arguments to max; returning -Inf in: max(x) 
 
Can you please help me with this problem?
 
Many thanks,
 
Aihua
 
Statistiician
University of British Columbia
 

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