[R] ggplot2 and geom_tile
o.godoy at met.no
Tue Apr 8 20:39:54 CEST 2014
I have been using ggplot2 for visualisation and I am really impressed by this.
I do however have a problem that returns when plotting various types of
spatial datasets as raster images. This is probably due to me not fully
understanding the package.
When I am plotting images using geom_tile, I sometimes only have small dots in
the image and at other times I have apparently blank images. On other
occasions it works nicely without me being able to spot the differences
between these plot requests nor the underlying data. I am usually plotting
geophysical information either on a geographical grid (latitude/longitude) or
on a map projection (normally using proj4 for the projection of data).
I have tried to play with the position attribute, but without success so far,
but believe that I suffer from some form of effect from this. I have tried to
google for information and I have read the manual pages but so far without
success. Do you have some suggested reading for problems like this? Is the
problem likely to be related to position?
I apologise for the vague description of the problem.
All the best
Dr. Oystein Godoy
Norwegian Meteorological Institute
P.O.BOX 43, Blindern, N-0313 OSLO, Norway
Ph: (+47) 2296 3000 (switchb) 2296 3334 (direct line)
Fax:(+47) 2296 3050 Institute home page: http://met.no/
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