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2012 Jan 17
4
breakpoints and nonlinear regression
...my script: bp.pavlu <- breakpoints(Na ~ f(yield, a, b), h=0.15, breaks=3, data=pavludata) plot(bp.pavlu) breakpoints(bp.pavlu) But I am confused as to how to graph the piecewise functions that make up the curve. I am not even sure if I am using breakpoints correctly. Do I just give it a linear relationhip (Na ~ yield), instead of what I have? Is there an easier way to calculate the confidence interval for a non-linear regression? I am new to R (as I've read in many questions), but I have most certainly tried many things and am just getting frustrated with the lack of examples for what I'd...