Dear all, I am doing some time series analysis with R now. The problem is, when I create a time series object using "ts" function, then after fitting the model, the predicted values cannot be plotted with "ts" object together using "lines". ie. ts.series<-ts(x,start, end) plot(ts.series) lines(predict(fit.model)) This doesn't work. Does anyone know about how to make it work ? Thank you very much
Figure it out. Just make predicted value "ts" object as well. On Apr 18, 9:20?pm, Fred <jianyun.fred... at gmail.com> wrote:> Dear all, > > I am doing some time series analysis with R now. The problem is, when > I create a time series object using "ts" function, then after fitting > the model, the predicted values cannot be plotted with "ts" object > together using "lines". ie. > > ts.series<-ts(x,start, end) > plot(ts.series) > lines(predict(fit.model)) > > This doesn't work. > > Does anyone know about how to make it work ? > > Thank you very much > > ______________________________________________ > R-h... at r-project.org mailing listhttps://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guidehttp://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code.
On Mon, Apr 18, 2011 at 7:20 AM, Fred <jianyun.fred.wu at gmail.com> wrote:> Dear all, > > I am doing some time series analysis with R now. The problem is, when > I create a time series object using "ts" function, then after fitting > the model, the predicted values cannot be plotted with "ts" object > together using "lines". ie. > > ts.series<-ts(x,start, end) > plot(ts.series) > lines(predict(fit.model)) > > This doesn't work. > > Does anyone know about how to make it work ?Its hard to tell what did not work without a complete example but try replacing lm with dyn$lm. Using built in Nile: library(dyn) fit.model <- dyn$lm(Nile ~ time(Nile)) plot(Nile) lines(predict(fit.model)) -- Statistics & Software Consulting GKX Group, GKX Associates Inc. tel: 1-877-GKX-GROUP email: ggrothendieck at gmail.com