[R] Problem with segmented function
Hi, I appreciate your help with the segmented function. I am relatively new to R. I followed the introduction of the 'segmented'-package by Vito Muggeo, but still it does not work. Here are the lines I wrote: data_test<-data.frame(x=c(1:10),y=c(1,1,1,1,1,2,3,4,5,6)) lr_test<-lm(y~x,data_test) seg_test<-segmented(lr_test,seg.Z~x,psi=1) /error in segmented.lm(lr_test, seg.Z ~ x, psi = 1) : A wrong number of terms in `seg.Z' or `psi'/ Thank you very much, Stella -- View this message in context: http://r.789695.n4.nabble.com/Problem-with-segmented-function-tp4639227.html Sent from the R help mailing list archive at Nabble.com. __ 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.
Re: [R] Problem with segmented
We really need the small reproducible example requested in the posting guide, including sample data, the actual R commands you used, the libraries required, and your OS and version of R. Sarah On Wed, Jan 11, 2012 at 9:08 AM, Filoche wrote: > Hi there. > > Here's the error message. > > Error in seg.lm.fit(y, XREG, Z, PSI, weights, offs, opz) : > (Some) estimated psi out of its range > > I have tried many ways to specify the arguments, but apparently the error > message is related to the estimated break point being invalid. However, my > estimation fall within range of my data. > > Thank for your help, > Phil > -- Sarah Goslee http://www.functionaldiversity.org __ 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.
Re: [R] Problem with segmented
Hi there. Here's the error message. Error in seg.lm.fit(y, XREG, Z, PSI, weights, offs, opz) : (Some) estimated psi out of its range I have tried many ways to specify the arguments, but apparently the error message is related to the estimated break point being invalid. However, my estimation fall within range of my data. Thank for your help, Phil -- View this message in context: http://r.789695.n4.nabble.com/Problem-with-segmented-tp4282398p4285505.html Sent from the R help mailing list archive at Nabble.com. __ 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.
Re: [R] Problem with segmented
dear Phil, I am not able to read the error message.. did you forget it? However: does x exist in the workspace? The following lines work: myreg2 = lm(y ~ x, data=xy) mysegmented = segmented(myreg2, seg.Z=~x, psi=c(245000)) myreg2 = lm(xy$y ~ xy$x) x<-xy$x mysegmented = segmented(myreg2, seg.Z=~x, psi=c(245000)) The following line does *not* work (as specified in ?segmented, argument seg.Z) myreg2 = lm(xy$y ~ xy$x) mysegmented = segmented(myreg2, seg.Z=~xy$x, psi=c(245000)) #error Hope to have been clear, vito Il 10/01/2012 17.17, Filoche ha scritto: Hi everyone. I'm trying to use the segmented function with the following data: For instance, I use segmented package as follow: myreg2 = lm(xy$y ~ xy$x) mysegmented = segmented(myreg2, seg.Z=~x, psi=c(245000), control = seg.control(display=FALSE)) Which get me to the following error : As a break point, a starting guess of 245000 seems fair. Anyone has an idea why I'm getting such error? Regards, Phil -- View this message in context: http://r.789695.n4.nabble.com/Problem-with-segmented-tp4282398p4282398.html Sent from the R help mailing list archive at Nabble.com. __ 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. -- Vito M.R. Muggeo Dip.to Sc Statist e Matem `Vianelli' Università di Palermo viale delle Scienze, edificio 13 90128 Palermo - ITALY tel: 091 23895240 fax: 091 485726 http://dssm.unipa.it/vmuggeo __ 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.
[R] Problem with segmented
Hi everyone. I'm trying to use the segmented function with the following data: For instance, I use segmented package as follow: myreg2 = lm(xy$y ~ xy$x) mysegmented = segmented(myreg2, seg.Z=~x, psi=c(245000), control = seg.control(display=FALSE)) Which get me to the following error : As a break point, a starting guess of 245000 seems fair. Anyone has an idea why I'm getting such error? Regards, Phil -- View this message in context: http://r.789695.n4.nabble.com/Problem-with-segmented-tp4282398p4282398.html Sent from the R help mailing list archive at Nabble.com. __ 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.
