You can't. You shouldn't. Segmented regression with unknown breakpoints in nonlinear regression, and R-squared doesn't make sense for nonlinear regression.
See: https://stat.ethz.ch/pipermail/r-help/2002-July/023461.html -- Bert On Sun, Jan 20, 2013 at 3:05 PM, Geoffrey Smith <g...@asu.edu> wrote: > Can anyone please tell me how to get the r-squared output from a piecewise > (segmented) regression using the strucchange package? Here is the R code I > have tried thus far. > > library(lmtest) > library(strucchange) > > data <- ts(c(rnorm(30), runif(30)), frequency = 12, start = c(2005, 01)) > > bpts <- breakpoints(data ~ 1) > > print(bpts) > > summary(bpts) > > coeftest(bpts) > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- Bert Gunter Genentech Nonclinical Biostatistics Internal Contact Info: Phone: 467-7374 Website: http://pharmadevelopment.roche.com/index/pdb/pdb-functional-groups/pdb-biostatistics/pdb-ncb-home.htm ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
