Dear Oscar
Great! Many thanks, your answer helped resolve my problem. Actually I
didnt realise that ggplot was contributing to my problem.
I just did not attach ggplot2 library, that was it. No error.
Best regards
Byman
On 25.02.2012 12:19, Oscar Perpiñán Lamigueiro wrote:
Bymanbym...@gmail.com writes:
Could anyone please help me.
I am plotting raster object (tasc) with 4 seasons: (DJF,MAM, JJA,
SON) as layers. I get this raster from an Netcdf file. I would like to
add (overlay) the country polygons (afrc) on top of these 4 plots of
levelplot. Levelplot function works quite ok but when I call this plot
(p) and plot with layer(sp.polygons(afr)), I get this error:
Error in get(x, envir = this, inherits = inh)(this, ...) :
Need at least one of stat and geom
[...]
sessionInfo()
R version 2.14.1 (2011-12-22)
Platform: i386-pc-mingw32/i386 (32-bit)
[...]
other attached packages:
[1] maps_2.2-5 fts_0.7.7 ggplot2_0.8.9
proto_0.3-9.2 reshape_0.8.4
[6] plyr_1.7.1 ncdf_1.6.6 rasterVis_0.10-9
hexbin_1.26.0 latticeExtra_0.6-19
[11] RColorBrewer_1.0-5 raster_1.9-67 maptools_0.8-14
lattice_0.20-3 sp_0.9-95
[16] foreign_0.8-49
loaded via a namespace (and not attached):
[1] zoo_1.7-7
Hello,
Both ggplot2 and latticeExtra define a layer function. You have to
call library(latticeExtra) *after* library(ggplot2) to use the
latticeExtra::layer mechanism instead of ggplot2::layer.
Best.
Oscar
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