Hello, You can find some hints there: http://geography.uoregon.edu/geogr/topics/index.html
Regards Le 12/06/28 14:26, iverson a écrit :
Hi guys i need some help to build choropleth. Basically i am trying to colour regions on the map by population. I possess the shape file of the country, and also the population data, however, i am having trouble to create the plot, below is my code: population=read.csv("nz2.csv") population names(population) nz=readShapeSpatial((sprintf('nz-geodetic-marks',tmp_dir))) nz$land_distr mapnames = nz$land_distr mapnamesnew=as.character(mapnames) popnames =as.character(mapnamesnew) pop =population$People pop2=as.numeric(pop) popdich = ifelse(pop2 < 100000, "red", "blue") popnames.lower = tolower(popnames) cols=popdich[match(mapnames,popnames.lower)] plot(nz,fill=TRUE,col=cols,proj="GCS_NZGD_2000") thanks in advance for any assistance Kind regards Iverson -- View this message in context: http://r.789695.n4.nabble.com/R-help-using-R-to-build-choropleth-tp4634686.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.