Is this producing what you want?
rasterVis::levelplot(xx, colorkey = list(at = at, labels = labels))
colorkey takes a list of arguments, including at and labels. This way it
can be differentiated from the at passed to levelplot itself.
Tim
On 24.09.2016 02:59, Ben Tupper wrote:
Hi Melanie,
Thanks for this. I tried that approach by adding layers with the latticeExtra
package - no joy yet. My lattice skills are a bit wobbly - but I have The Good
Books in hand so I'll keep noodling around and may prevail yet.
https://www.r-project.org/doc/bib/R-books_bib.html#R:Sarkar:2008
https://www.r-project.org/doc/bib/R-books_bib.html#R:Bivand+Pebesma+Gomez-Rubio:2008
http://oscarperpinan.github.io/spacetime-vis/
Cheers,
Ben
On Sep 23, 2016, at 12:55 PM, Bacou, Melanie <m...@mbacou.com> wrote:
Here is a stump that might also work with levelplot():
# Plot raster with no scalebar first
raster::plot(r, col=vector_of_colors, legend=FALSE, axes=FALSE)
# Add a custom scalebar
raster::plot(r, legend.only=TRUE,
col=vector_of_colors,
axis.args=list(at=1:length(vector_of_labels), labels=vector_of_labels)
On 9/23/2016 12:11 PM, Ben Tupper wrote:
Hi,
I would like to specify the labels drawn on the scalebar for a multi-raster
plot. I have seen this exchange (and try to replicate for multiple rasters
below)
https://stat.ethz.ch/pipermail/r-help/2011-August/286705.html
I can't make that work with rasterVis::levelplot()
# start preparatory
library(raster)
library(rasterVis)
x <- raster::raster(volcano,
crs = '+proj=longlat +datum=WGS84 +ellps=WGS84 +towgs84=0,0,0',
xmn = -45, xmx = -40, ymn = 39, ymx = 47)
xx <- addLayer(x,x,x)
at <- seq(90, 200, length = 10)
labels <- rep(" ", length(at))
labels[1] <- "low"
labels[length(labels)] <- "high"
# end preparatory
# try as in help exchange above - ticks are labeled with numerics
rasterVis::levelplot(xx,
colorkey = list(at = at),
labels = list(labels = labels, at = at) )
# try as described in ?rasterVis::levelplot section for labels
# ticks still labeled with numerics
rasterVis::levelplot(xx,
at = at,
labels = labels )
I'm stumped! How do I control the tick labels on a scalebar?
Thanks!
Ben
sessionInfo()
R version 3.3.1 (2016-06-21)
Platform: x86_64-apple-darwin13.4.0 (64-bit)
Running under: OS X 10.11.6 (El Capitan)
locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] rasterVis_0.40 latticeExtra_0.6-28 RColorBrewer_1.1-2 lattice_0.20-33
[5] raster_2.5-8 sp_1.2-3
loaded via a namespace (and not attached):
[1] zoo_1.7-13 rgdal_1.1-10 parallel_3.3.1 hexbin_1.27.1
[5] Rcpp_0.12.6 grid_3.3.1 viridisLite_0.1.3
Ben Tupper
Bigelow Laboratory for Ocean Sciences
60 Bigelow Drive, P.O. Box 380
East Boothbay, Maine 04544
http://www.bigelow.org
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Ben Tupper
Bigelow Laboratory for Ocean Sciences
60 Bigelow Drive, P.O. Box 380
East Boothbay, Maine 04544
http://www.bigelow.org
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--
#####################################
Tim Appelhans
Department of Geography
Environmental Informatics
Philipps Universität Marburg
Deutschhausstraße 12
Raum 00A08
35032 Marburg (Paketpost: 35037 Marburg)
Germany
Tel +49 (0) 6421 28-25957
http://environmentalinformatics-marburg.de/
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