The zoo package supports irregular time series with arbitrary
time classes. It include na.approx and na.spline for interpolation.
library(zoo)
vignette("zoo")
vignette("zoo-quickref")
On 9/23/06, phil henshaw <[EMAIL PROTECTED]> wrote:
> I built some reasonably successful tools in a graphical database for
> reconstructing the developmental turning points for feedback loop driven
> natural processes. I'm trying to move it to R and am having
> difficulty with the very basics, i.e. a) defining time series using time
> as a natural number rather than a place in a table. I was also hoping
> b) someone might have built some of the diverse kinds of interpolation
> tools needed for irregular data on evolving systems to reconstruct their
> probable naturalistic fluctuation and turning points, making good
> representations of them compatible with other analytical tools.
>
> Is there any functionality for either a) or b)? I could be just lazy,
> but 'its' seems to require a calendar date format, and I'm interested
> in reading the unique developmental system dynamics of some subjects in
> irregular milliseconds and others in irregular millions of years.
>
> Another thing I miss is being able to 'touch' and query the graphic
> objects produced. In Autolisp I was able to store a complete history
> of the operations performed in the list associated with any graphic
> object and have it pop up by clicking it with the mouse.
>
> Is there any kind of interface like that available or coming?
>
>
> Phil Henshaw ¸¸¸¸.·´ ¯ `·.¸¸¸¸
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 680 Ft. Washington Ave
> NY NY 10040
> tel: 212-795-4844
> e-mail: [EMAIL PROTECTED]
> explorations: www.synapse9.com <http://www.synapse9.com/>
>
>
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>
>
>
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