[R] errors appears in my time Series regression fomula

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,

Re: [R] errors appears in my time Series regression fomula

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