Edzer,

Thanks a lot for all the advice. I'll look after it.

best,

mathieu

2011/8/29 Edzer Pebesma <edzer.pebesma@uni-muenster.de>

> Mathieu,
>
> you may want to look into cut methods for Date, e.g. in your example:
>
> xyplot(y_sref~x_sref|cut(time,4), as.data.frame(ciotat.t))
>
>
>
> On 08/29/2011 10:31 AM, Mathieu Rajerison wrote:
> > Ok,
> >
> > May I ask you another question?
> >
> > When I use parameter number for stplot, how does it decide to split plots
> by
> > number?
> >
> > The orange mark on the top of each plot shows me that it isn't by equal
> time
> > intervals. I guess it is by equal object count?
> >
> > Is there a way to indicate time periods on top of each plot?
> >
> > Thanks
> >
> >
> > 2011/8/26 Edzer Pebesma <edzer.pebesma@uni-muenster.de>
> >
> >> Mathieu,
> >>
> >> as stplot for STIDF's is still pretty "bare", or simple, you might as
> >> well work directly with xyplot from lattice. Having your data, it turns
> >> out you only have a limited number of dates, the following seems to
> work:
> >>
> >> library(lattice)
> >> xyplot(y_sref~x_sref|time,  as.data.frame(ciotat.t),
> >>   scales=list(draw=F), asp="iso", xlab=NULL, ylab=NULL,
> >>   panel = function(x,y,...) {
> >>      sp.lines(contour);
> >>      panel.xyplot(x,y,...)
> >>   }
> >> )
> >>
> >> as stplot assumes time is irregular, it uses
> >>
> >> xyplot(y_sref~x_sref | equal.count(time), ...
> >>
> >> which bins time into a small number of classes.
> >>
> >> Hth,
> >>
> >> On 08/26/2011 02:16 PM, Mathieu Rajerison wrote:
> >>> Hi,
> >>>
> >>>
> >>> I have a question about stplot.
> >>>
> >>> Let's say I'd like to plot via multi-panel a series of plots separated
> by
> >> a
> >>> given time interval. How can I accomplish that?
> >>>
> >>> Also, let's say this time interval is specified between thow given time
> >>> instances, for example: every week between 14/07/11 and 28/08/11.
> >>>
> >>> Is there a way in stplot to perform these operations?
> >>>
> >>>
> >>> Any help would be greatly appreciated
> >>>
> >>> *Again congrats for the powerful and easy-to-use spacetime package with
> >>> strong documentation!*
> >>>
> >>>       [[alternative HTML version deleted]]
> >>>
> >>> _______________________________________________
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> >>> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> >>
> >> --
> >> Edzer Pebesma
> >> Institute for Geoinformatics (ifgi), University of Münster
> >> Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
> >> 8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
> >> http://www.52north.org/geostatistics      e.pebesma@wwu.de
> >>
> >> _______________________________________________
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> >> R-sig-Geo@r-project.org
> >> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
> >>
> >
> >       [[alternative HTML version deleted]]
> >
> >
> >
> >
> > _______________________________________________
> > R-sig-Geo mailing list
> > R-sig-Geo@r-project.org
> > https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>
> --
> Edzer Pebesma
> Institute for Geoinformatics (ifgi), University of Münster
> Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251
> 8333081, Fax: +49 251 8339763  http://ifgi.uni-muenster.de
> http://www.52north.org/geostatistics      e.pebesma@wwu.de
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo@r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo
>

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