Human beings have always been surprisingly good at visual processing. There are a few videos on observation test on YouTube that test your visual skills by flashing a number of pictures very quickly. 244 more words
The package ggplot2 is one of the most powerful resource for plot making available in R.
Although, it has with quite a learning curve, that could be intimidating, it is definitely worth the effort. 246 more words
GRASS GIS offers some useful but basic plotting options for raster data. However, for plotting of data in attribute tables and for more advanced graphs, we need to use other software tools. 53 more words