On Fri, 18 Mar 2005, Uwe Ligges wrote: > Oarabile Ruth Molaodi wrote: > > > I am trying to learn how to create my own function in R. I want to > > create a function that can plot the polygons/regions/map given the > > coordinates of each region. The function should be able to colour the > > poplygons according to the data supplied ,for examples the means or > > rates of disease at a region/polygon. > > > You might want to take a look at package "maps".
Or others mentioned on http://www.R-project.org/Rgeo, for example, see how the DCluster package plots disease rates, or look at plot.polylist() in the maptools package. The maps package does depend on the user building a geographical database first, rather than taking an arbitrary ring of coordinates as a polygon. Colouring is a class interval problem, which has to be done separately anyway - see the examples on the help pages for the relevant functions (hint - findInterval() is good at setting the colour vector for the polygons). Roger Bivand > > Uwe Ligges > > > > your advise will be highly appreciated. > > > > Thanks in advance for your help. > > > > Oarabile > > > > ______________________________________________ > > R-help@stat.math.ethz.ch mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide! > > http://www.R-project.org/posting-guide.html > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html > -- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Breiviksveien 40, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 93 93 e-mail: [EMAIL PROTECTED] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html