"...Probably the only shared characteristic would be that these are things you can’t really get unmotivated people to grasp, but if someone is motivated, they’ll find their way in somehow. And enjoy it, after all, it is supposed to be fun, isn’t it?"

"From a period in which geographic information systems, and later geocomputation and geographical information science, have been agenda setters, there seems to be interest in trying things out, in expressing ideas in code, and in encouraging others to apply the coded functions in teaching and applied research settings."

"Hi Tom. I have uploaded some comments on your book. You should check if you are able to run the code on upgraded versions of R. Otherwise fine, nice set of full-scale examples."