Re: [R] Piecewise regression using segmented package plotted in xyplot

Friday, 28 August 2015 14:12 To: r-help@r-project.org Subject: [R] Piecewise regression using segmented package plotted in xyplot Hi, xyplot(threshold ~ age |frequency.a, data=rage, groups=HL, cex=0.5, layout=c(7,4), par.strip.tex=list(cex=0.8), xlab="Age (years)", ylab=&

Re: [R] Piecewise regression using segmented package plotted in xyplot

I perhaps should have added a stronger warning here; note that the model fitting in my previous post (below) uses explicit initial breakpoints for segmented (specifically, c(30,60) at line 1 of the get.segments() ). if you know where yours are, substitute them there. Otherwise, you'd need to us

Re: [R] Piecewise regression using segmented package plotted in xyplot

There isn't an abline method for segmented, and even if there were you'd need segments() for a segmented line plot. You're going to have to roll your own. That will need a function to extract the break locations and predicted values at those points I don't have your data, so I can't do one spe

[R] Piecewise regression using segmented package plotted in xyplot

Hi, xyplot(threshold ~ age |frequency.a, data=rage, groups=HL, cex=0.5, layout=c(7,4), par.strip.tex=list(cex=0.8), xlab="Age (years)", ylab="Threshold (dB SPL)", na.rm="TRUE", panel=function(x,y,groups,...) { panel.superpose(x,y,groups=HL,...) # panel.abline(segmented(lm(threshold~age