[R-sig-Geo] expanding range in legend in spplot kriging

[Edzer Pebesma]

Jessica, please try the at argument in spplot:

require(sp)
loadMeuse()
spplot(meuse.grid["dist"], at = seq(-1,2,length=20),
col.regions=bpy.colors())


On 12/04/2011 07:36 PM, Jessica Ruth Hullman wrote:
> 
> Hi,
> 
> I've been working with gstat and some of the kriging examples for an
> experiment, such as using spplot() shown here:
> http://casoilresource.lawr.ucdavis.edu/drupal/node/442. I'm using radon
> values to create the regions.
> 
> What I want to do is change the range of the values in the legend so that
> it is larger than the values that are actually shown in the map itself, but
> without having to change/add any values to the data itself. It seems that
> the legend is always created specific to the map. Is there a way to
> manually change the range of values shown in the legend (while adding
> cols/cuts)? Do I need to create a map that does have a value that goes as
> high as I want, then somehow save the legend from this plot so I can reuse
> it on subsequent plots? 
> 
> I've looked at the trellis settings to see if I could change it there, but
> nothing jumps out as me. Any help on a good strategy would be appreciated,
> thanks for your time.
> 
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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