i try to predict the drought from the precipitation index of each month for
100 year, from 1985 to 2006
here is my code, i have the
pdsi<-read.csv("pdsi.csv")
pdsi<-ts(pdsi,start=1985,freq=100)
HoltWinters(pdsi)
plot(pdsi)
lines(HoltWinters(pdsi)$fitted,col="red")
pdsi.hw<-HoltWinters(pdsi)
predict(pdsi.hw,n.ahead=48)
plot(pdsi,xlim=c(1985,2006))
lines(predict(pdsi.hw,n.ahead=48),col=2)
my error message is
*Error in xy.coords(x, y) : 'x' and 'y' lengths differ*
** if anyone know please give me advice
*thank in advance*
*jam*
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