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
plot and lines with time series data
3 messages · Fred, Gabor Grothendieck
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
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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