I'm trying to use gplot() in rasterVis to plot a RasterLayer object
using ggplot2
graphics, but I keep getting an error. Here is a reproducible
example:
library(raster)
library(rasterVis)
r <- raster(ncol=10, nrow=10)
values(r) <- 1:ncell(r)
gplot(r)
The following `from` values were not present in `x`: col, color, pch,
cex, lty, lwd, srt, adj, bg, fg, min, max
Error: No layers in plot
I see the following warning when I load rasterVis:
Loading required package: ggplot2
Attaching package: ?ggplot2?
The following object(s) are masked from ?package:latticeExtra?:
layer
Perhaps this is part of the problem? Or I am misunderstanding the
gplot() methods somehow? Thanks for any suggestions.
Natalie
Session info:
R version 2.14.1 (2011-12-22)
Platform: x86_64-pc-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_CA.UTF-8 LC_NUMERIC=C
LC_TIME=en_CA.UTF-8
[4] LC_COLLATE=en_CA.UTF-8 LC_MONETARY=en_CA.UTF-8
LC_MESSAGES=en_CA.UTF-8
[7] LC_PAPER=C LC_NAME=C
LC_ADDRESS=C
[10] LC_TELEPHONE=C LC_MEASUREMENT=en_CA.UTF-8
LC_IDENTIFICATION=C
attached base packages:
[1] grid stats graphics grDevices utils datasets
methods base
other attached packages:
[1] ggmap_2.3 RgoogleMaps_1.2.0.3 png_0.1-4
maps_2.3-2 rasterVis_0.20-07
[6] hexbin_1.26.2 latticeExtra_0.6-24 RColorBrewer_1.0-5
lattice_0.20-0 ggplot2_0.9.3.1
[11] rgdal_0.8-9 raster_2.1-25 sp_1.0-9
ncdf_1.6.6 vimcom_0.9-8
[16] setwidth_1.0-3 colorout_1.0-0
loaded via a namespace (and not attached):
[1] colorspace_1.2-2 dichromat_2.0-0 digest_0.6.3 gtable_0.1.2
labeling_0.1 mapproj_1.2-1
[7] MASS_7.3-16 munsell_0.4 plyr_1.8 proto_0.3-10
reshape2_1.2.2 rjson_0.2.12
[13] scales_0.2.3 stringr_0.6.2 zoo_1.7-9