Useful websites or blogs introducing R functioning as a GIS.
http://r-gis.net/
http://menugget.blogspot.de/
This is a 'Hotpot' of solutions to specific problems in programming, GIS, statistics, data management, etc, which i come across during my academic research. I am a ecology Ph.D. student. The specific content will include R, Fortran, Python languages, GIS use, statistical methods, etc. Writing style will be problem-oriented, of which the problems will always be very specific or small.