[R-sig-Geo] gplot error in rasterVis

[Natalie Wagenbrenner]

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