John,
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
windows xp
R 2.8.1
I am trying to plot the -log(log(survival)) to visually test the proportional
hazards assumption of a Cox regression. The plot, which should give two lines
(one for each treatment) gives only one line and a warning message. I would
appreciate help getting two lines, and an
, May 11, 2009 12:19 PM
To: r-h...@stat.math.ethz.ch
Subject: [R] Warning trying to plot -log(log(survival))
windows xp
R 2.8.1
I am trying to plot the -log(log(survival)) to visually test the
proportional hazards assumption of a Cox regression. The plot, which
should give two lines (one
11, 2009 12:19 PM
To: r-h...@stat.math.ethz.ch
Subject: [R] Warning trying to plot -log(log(survival))
windows xp
R 2.8.1
I am trying to plot the -log(log(survival)) to visually test the
proportional hazards assumption of a Cox regression. The plot, which
should give two lines (one
...@stat.math.ethz.ch
Subject: RE: [R] Warning trying to plot -log(log(survival))
Time30 is simply Time/30 and reflects months of follow-up.
A copy of my data follows:
Time,Time30,Died,Age,Rx
3,0.1,0,40,2
8,0.26667,1,21,2
10,0.3,1,18,2
12,0.4,0,42,2
16,0.5,1,23,2
5 matches
Mail list logo
