[R-sig-Geo] stplot: choosing constant time interval between plots

[Edzer Pebesma]

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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-- 
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 at wwu.de