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graph2
2008 Mar 02
1
Problem plotting curve on survival curve (something silly?)
...scale=exp(coef(my_curve.Pred)),
shape=1/my_curve.Pred$scale, lower.tail=FALSE),from=0, col="grey",
to=max(TestData$Survival), add=TRUE)
This is where I have my problem - and I know its going to be something
really silly! Look at my output:
http://www.wittongilbert.free-online.co.uk/RGraph2.jpg the trend line is
zig-zagging between y=0 and the value it should be. If you draw a line
along the tips of the zig-zags I guess thats a reasonable trendline...
Anyone able to help me on this?
Also is it possible to get an R-squared type value for the fit of this
curve from someplace?
Fin...