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...used xyplot() to plot the longitudinal data. One problem is that xyplot() recycles the color of auto.key so that every 7th subject has the same color (symbol if setps() was used). Is there a way so that every subject will have a unique color or symbol? Thanks Osman -- Osman O. Al-Radi, MD, MSc, FRCSC Fellow, Cardiovascular Surgery The Hospital for Sick Children University of Toronto, Canada [[alternative HTML version deleted]]

Dear R-help, Would it be appropriate to do the following to calculate a p-value for the difference between c-ind of x1 and c-inx of x2 using the output from rcorrp.senc() > r<-rcorrp.senc(x1,x1,y) > pValue<-1-pnorm((r[11]-r[12])/(r[2]/r[5])*1.96) Osman O. Al-Radi, MD, MSc, FRCSC Chief Resident, Cardiac Surgery University of Toronto, Canada

...nt in each panel? library(lattice) x <- rnorm(400) y <- rnorm(400) a <- gl(4, 100) xyplot(y~x|a, panel=function(...){ panel.loess(...) panel.text(0,2,label=c('best','better','bad','worst'))}) Thanks Osman Osman O. Al-Radi, MD, MSc, FRCSC Staff Cardiovascular Surgeon Co-medical director, Tissue Bank The Hospital for Sick Children University of Toronto, Canada [[alternative HTML version deleted]]

...c(0,1),300,rep=T,p=c(0.99,0.01)), sample(c(0,1),40,rep=T,p=c(0.95,0.05)), sample(c(0,1),2,rep=T,p=c(0.5,0.5)), sample(c(0,1),10,rep=T,p=c(0.9,0.1)), sample(c(0,1),40,rep=T,p=c(0.8,0.2))) df<-data.frame(group=group,outcome=as.numeric(outcome)) Osman O. Al-Radi, MD, MSc, FRCSC Staff Cardiovascular Surgeon Co-medical director, Tissue Bank The Hospital for Sick Children University of Toronto, Canada [[alternative HTML version deleted]]

...need at least one panel Also When I try to use the auPred() function I get the follwoing error msg: >plot(augPred(Lac.lme)) Error in tapply(as.character(object[[nm]]), groups, FUN[[dClass]]) : arguments must have same length Any suggestions? Thanks -- Osman O. Al-Radi, MD, MSc, FRCSC Fellow, Cardiovascular Surgery The Hospital for Sick Children University of Toronto, Canada

...rves one for each group. the code below does that but on two different pannels, I'd like to have both curves on the same pannel with different colors. xyplot(y~time|group, groups=subject, panel=function(...){ panel.loess(...) } ,data=df) -- Osman O. Al-Radi, MD, MSc, FRCSC Fellow, Cardiovascular Surgery The Hospital for Sick Children University of Toronto, Canada [[alternative HTML version deleted]]

...9;none', y.n.risk=unique(summary(km)$surv)) Any suggestion on addressing this problem would be apprecited. Also, is there a way to add a tick mark to the survival curve at times of censoring similar to the mark.time=T argument in plot.survplot()? Thanks Osman -- Osman O. Al-Radi, MD, MSc, FRCSC Fellow, Cardiovascular Surgery The Hospital for Sick Children University of Toronto, Canada [[alternative HTML version deleted]]

...ubject. How can I create a create a plot with a single panel where all four groups are superimposed using different line colors and symbols for each group, but preserving the longitudinal nature of the data (i.e. one line per subject). Thanks for your help. Osman -- Osman O. Al-Radi, MD, MSc, FRCSC Cardiovascular Surgeon The Hospital for Sick Children University of Toronto, Canada [[alternative HTML version deleted]]