[R-sig-Geo] sp

[Francesco Perugini]

Dear all,I'm not very familiar with R. 
I'm tying to use this code I've written months ago. At that time it was working but now it is not.
library(sp)library(spdep)example(columbus)
coord <- coordinates(columbus)and get this messageError in (function (classes, fdef, mtable)  : 
  unable to find an inherited method for function ‘coordinates’ for signature ‘"sf"’I've tried to also calllibrary(sf)but got the same error.I was wondering why?Thanks a lot.Francesco



	[[alternative HTML version deleted]]