[R-sig-Geo] First thoughts on spatio-temporal classes...

[Michael Sumner]

Hi, I just want to let you know that I'm hoping to update the trip
(and tripEstimation) packages over the next few months so I'm very
open to suggestions if you are interested.

The main thing I want to do is to ensure that the capacity in sp for
use of 3 or more coordinates (X, Y, Z, T,...) is well supported, and
then simplify the implementation of trip on top of
SpatialPointsDataFrame. It would be nice to make it less of a special
case, and perhaps it would be best to apply it as a multipoint type
(as presented in the ASDAR book). That might be a good way to handle
collections (such as sets of individual trips).


Regards, Mike


On Sat, Sep 19, 2009 at 8:15 AM, VIRGILIO GOMEZ RUBIO
<Virgilio.Gomez at uclm.es> wrote:
> Hi Blair,
>
> I am visiting SAMSI this fall and I would like to get involved in this. Is
> there any working group discussing this? If not, perhaps we could have a
> chat with all the people interested in the area (samsi, duke, unc, ncsu,...)
> and talk about this.
>
> Best wishes,
>
> Virgilio
>
> Sent from my iPhone
>
> On 18/09/2009, at 12:25, "Blair Christian" <blair.christian at gmail.com>
> wrote:
>
>> Hi all,
>>
>> This is in response to an earlier post of mine inquiring about options for
>> spatio-temporal classes in R.
>>
>> Thank you to all who replied for your interest in spatio-temporal data
>> classes and methods.  There were many excellent comments in your emails.
>>  I
>> have been attending the SAMSI conference on space-time
>> analysis<http://www.samsi.info/programs/2009spatialprogram.shtml>this
>> week and have put together a summary (a working draft) of some
>>
>> thoughts<http://www.isds.duke.edu/%7Ejbc30/SpatioTemporal/workGroupComp.pdf>I
>> have about classes.
>>
>> I also started a bare bones webpage:
>> http://www.isds.duke.edu/~jbc30/SpatioTemporal/
>>
>> A also put up the latex source code and bib file I used if you are
>> interested in making additions, corrections, or other.  Please email me
>> any
>> changes, and I'll maintain an RCS version of it.
>>
>> I'll put some plots up there when I have time to give you all an idea of
>> what my context is.  Ironically, I can't ssh to the webserver from work
>> (at
>> the US EPA), so I can only update it from home.
>>
>>
>> Here are some questions to you all:
>>
>> - What data do you have interest in analyzing?
>>
>> - What type of code do you have to contribute?
>>
>> - Are you interested in writing classes/methods?  If so, what is your
>> background?  (I can provide several tutorials on S4 classes on the web
>> that
>> I found useful).
>>
>> I will pass along these related packages as being related to
>> spatio-temporal
>> data:
>> trip (trip class extends SpatialPointsDataFrame), pastecs, tripEstimation,
>> hydrosalinity(?), PBSmapping(?), RadioSonde, STARIMA(?), Bayesian Vector
>> Accumulation(?), spBayes(?), INLA (Havard Rue website)
>>
>> I skimmed a fair number of time related packages (more than just timeDate
>> and chron), including xts, zoo, (tseries, timeSeries, ts, its, etc) as
>> well,
>> and came to the conclusion that it would best to allow either a time
>> series
>> type package (regular or irregular times) as well as a package for
>> continuous time (functional data, like paths of animals, in the trip
>> library), and I'm a fan of the fda
>> library<http://ego.psych.mcgill.ca/misc/fda/>.
>> It would be nice to have easy spline/FDA access for datasets where time is
>> collected in a continuous manner rather than in the usual arima grid
>> setting.
>>
>> With that information dump, I'll try and get another update out in about
>> two
>> weeks depending on my schedule, which should include any progress I've
>> made
>> that I'm satisfied with.  I will respond to individual emails as well.
>>
>>
>> Cheers,
>> Blair
>>
>>   [[alternative HTML version deleted]]
>>
>> _______________________________________________
>> R-sig-Geo mailing list
>> R-sig-Geo at stat.math.ethz.ch
>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at stat.math.ethz.ch
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>