This question may be a duplicate of an earlier unanswered one. I still have the problem.
I am trying to use a zipcode shapefile and coming up with the following error:
tract <- readOGR(dsn = ".", layer = "cb_2013_us_zcta510_500k") tract<-fortify(tract, region="GEOID10") Error: isTRUE(gpclibPermitStatus()) is not TRUE
I have tried installing gpclib to fix this but then I get the following error:
install.packages("gpclib") Installing package into ‘C:/Users/Nick/Documents/R/win-library/3.2’ (as ‘lib’ is unspecified) Package which is only available in source form, and may need compilation of C/C++/Fortran: ‘gpclib’ These will not be installed