That line:

lines(yfit1,c=3)
does not appear in the code that you sent.  I assume that you meant
'col=3'.  The message may be saying that there are multiple partial matches
for 'c' as a parameter.  The code you included worked fine on my system.  Do
you manually input this line?

2010/1/18 snowcat wong <cathy_white725@hotmail.com>

>
> Dear all,
>
>
>
> I found really difficult with the time series questions, please help me
> with this monthly airline series!
>
>
>
> I have run the following r code, and there is an error appeared at the end.
>  The data files was enclosed in the email.
>
> I'm sorry the errors message appeared in chinese, but it says
> "plot.xy(xy.coords(x, y), type = type, ...) :
>
> errors in argument has more than 3 matches"
>
>
>
> > y=scan('F:/Math355/AIRLINE.txt',skip=2,nlines=18)
> Read 144 items
> > yts=ts(log(y))
> > plot(yts,main="LOG AIRLINE TOTALS",type='p',col=2)
> > n=length(y)
> > time=seq(1:n)
> >
> > month=c(rep(seq(1:12),12))
> > fmonth=as.factor(month)
> > ymod1=lm(yts~time+fmonth)
> > summary(ymod1)
>
>
>
> > yfit1=ymod1$fitted
> > lines(yfit1,c=3)
> 错误于 plot.xy(xy.coords(x, y), type = type, ...) :
>  变元3有多个与之相对应的正式变元
>
>
> Also, for a similar data set quarterly sales of spirits series, what is the
> best model to use?? Should I use ARIMA??
>
>
>
>
>
>
>
> Many thanks and regard,
>
> Cathy Wong
>
> _________________________________________________________________
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>
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> PLEASE do read the posting guide
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> and provide commented, minimal, self-contained, reproducible code.
>
>


-- 
Jim Holtman
Cincinnati, OH
+1 513 646 9390

What is the problem that you are trying to solve?

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