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mydatarame
2013 Jun 29
0
Quantile Regression/(package (quantreg))
Mike,
Do something like:
require(rms)
dd <- datadist(mydatarame); options(datadist='dd')
f <- Rq(y ~ rcs(age,4)*sex, tau=.5) # use rq function in quantreg
summary(f) # inter-quartile-range differences in medians of y (b/c tau=.5)
plot(Predict(f, age, sex)) # show age effect on median as a continuous
variable
For more help type ?summary.rms and...