Manuel, I think this is wrong: >> r = pointsToRaster(poblados, r)
Try: r <- pointsToRaster(r, poblados) Robert On Thu, Nov 4, 2010 at 11:02 AM, Manuel Spínola <mspinol...@gmail.com> wrote: > Thank you very much Robert. > > I am reading the raster vignette right now. > > I got this error: > >> r = raster(corredor) >> res(r) = 50 >> r = pointsToRaster(poblados, r) > Error en .pointsToMatrix(xy) : > points should be vectors of length 2, matrices with 2 columns, or a > SpatialPoints* object >> pobla...@data > x y > 1 500577.8 1155145 > 2 495470.2 1164700 > 3 489082.0 1152228 > 4 494559.3 1171489 > 5 492094.0 1157327 > 6 490937.9 1155423 > 7 488748.0 1153979 > 8 491910.8 1154378 > 9 485430.7 1148051 > 10 500060.9 1148109 > 11 491212.5 1159109 > 12 487253.9 1151491 > 13 480244.6 1181636 > 14 480651.1 1184371 > 15 477555.2 1181189 > 16 486482.8 1167946 > 17 483764.4 1164624 > 18 477301.6 1192979 > 19 483737.4 1192048 > 20 480760.2 1192652 > 21 476126.6 1165617 > 22 481182.4 1185941 > > > Best, > > Manuel > > On 04/11/2010 11:41 a.m., Robert J. Hijmans wrote: > > Manuel. > > Did you try it without converting? The help file in raster says it > needs a SpatialPoints* object. The '*' is a wild card that in this > case stands for 'DataFrame'. > > The answer to your question: > > as(x, 'SpatialPoints') > > You could find the answer to many of this type of questions by reading > the vignettes of sp and raster, and by searching the R-sig-geo help > archives, and looking at the R spatial wiki. > > Robert > > On Thu, Nov 4, 2010 at 10:25 AM, Manuel Spínola <mspinol...@gmail.com> > wrote: > > Dear list members, > > > I am trying to create a raster from points, but I read the points from a > shapfile, so I have the points object as a SpatialPointsDataFrame. > To use the function pointsToRaster I need the points as SpatialPoints. > > How to convert a SpatialPointsDataFrame object to a SpatialPoints? > Best, > > Manuel > > > -- > *Manuel Spínola, Ph.D.* > Instituto Internacional en Conservación y Manejo de Vida Silvestre > Universidad Nacional > Apartado 1350-3000 > Heredia > COSTA RICA > mspin...@una.ac.cr > mspinol...@gmail.com > Teléfono: (506) 2277-3598 > Fax: (506) 2237-7036 > Personal website: Lobito de río > <https://sites.google.com/site/lobitoderio/> > Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/> > > [[alternative HTML version deleted]] > > > _______________________________________________ > R-sig-Geo mailing list > R-sig-Geo@stat.math.ethz.ch > https://stat.ethz.ch/mailman/listinfo/r-sig-geo > > > > > -- > Manuel Spínola, Ph.D. > Instituto Internacional en Conservación y Manejo de Vida Silvestre > Universidad Nacional > Apartado 1350-3000 > Heredia > COSTA RICA > mspin...@una.ac.cr > mspinol...@gmail.com > Teléfono: (506) 2277-3598 > Fax: (506) 2237-7036 > Personal website: Lobito de río > Institutional website: ICOMVIS _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo