[R] lm and time series.

stephen sefick ssefick at gmail.com
Fri Sep 5 23:01:00 CEST 2008

what do you want to do?

On Fri, Sep 5, 2008 at 3:22 PM,  <rkevinburton at charter.net> wrote:
> I am sorry but I looked at ?lm and could not see any guidance on writting a formula. If I have two arrays or a data set then I know how to do that (y ~ x) but for a time series I am not sure how to write y or x.
> Thank you.
> Kevin
> ---- Gabor Grothendieck <ggrothendieck at gmail.com> wrote:
>> The Time Series section in ?lm should be self explanatory.   If you are using
>> diff's and lag's then look at the dyn package.
>> On Fri, Sep 5, 2008 at 12:25 PM,  <rkevinburton at charter.net> wrote:
>> > I did a ?lm and it said basically to be careful when using lm and a time series. But my question is probably more to do with my inexperience that anything. If I have a time series object 'ti' how do I write the formula? The response is the value at any particular time and the time is basically the index of the time series. But I don't know how to put that into a formula.
>> >
>> > Thank you.
>> >
>> > Kevin
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Stephen Sefick
Research Scientist
Southeastern Natural Sciences Academy

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