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2012 Jun 26
1
rms package-superposition prediction curve of ols and data points
Hello,
I have a question about the ?plot.predict? function in Frank Harrell's rms
package.
Do you know how to superpose in the same graph the prediction curve of ols
and raw data points?
Put most simply, I would like to combine these two graphs:
> fit_linear <- ols (y4 ~ rcs(x2,c(5,10,15,20,60,80,90)), x=TRUE, y=TRUE)
> p <- Predict(fit_linear,x2,conf.int=FALSE)
> plot (p, ylim =c(-2,0.5), xlim=c(0,100)) # graph n?1
> z <- plot (x2,y4,ylim=c(-2,0.5),xlim=c(0,100),type="p",lwd=6,col="blue")
> # graph n?2...