Here are the sessionInfo() and traceback() results following the failed import. It looks like I am not using the most recent version of sp so I am trying to figure out the terms in the call to update.package() and with the most recent version I will try again. The .shp file is ~30 megabytes and the associated .dbf is ~15 megabytes, though I don't think the latter is included in the import. I have 2G of memory on this machine....
Tyler ** *> roads<-as(as(readShapeLines(fn="D:\\GIS\\road2004.shp"), "SpatialLines"), "psp") *Error in function (classes, fdef, mtable) : unable to find an inherited method for function "coordinates", for signature "numeric" *> sessionInfo()* R version 2.8.1 (2008-12-22) i386-pc-mingw32 locale: LC_COLLATE=English_Canada.1252;LC_CTYPE=English_Canada.1252;LC_MONETARY=English_Canada.1252;LC_NUMERIC=C;LC_TIME=English_Canada.1252 attached base packages: [1] stats graphics grDevices datasets utils methods base other attached packages: [1] spatstat_1.15-0 deldir_0.0-7 gpclib_1.4-3 mgcv_1.4-1.1 maptools_0.7-20 foreign_0.8-29 sp_0.9-29 loaded via a namespace (and not attached): [1] grid_2.8.1 lattice_0.17-17 tools_2.8.1 *> traceback()* 13: stop("unable to find an inherited method for function \"", f...@generic, "\", for signature ", cnames) 12: function (classes, fdef, mtable) { methods <- .findInheritedMethods(classes, fdef, mtable) if (length(methods) == 1) return(methods[[1]]) else if (length(methods) == 0) { cnames <- paste("\"", sapply(classes, as.character), "\"", sep = "", collapse = ", ") stop("unable to find an inherited method for function \"", f...@generic, "\", for signature ", cnames) } else stop("Internal error in finding inherited methods; didn't return a unique method") }(list("numeric"), function (obj) standardGeneric("coordinates"), <environment>) 11: coordinates(coords) 10: Line(coords = shape$verts[from[i]:to[i], ]) 9: .shapes2LinesList(shapes[[i]], ID = IDs[i]) 8: .shp2LinesDF(Map, proj4string = proj4string) 7: withCallingHandlers(expr, warning = function(w) invokeRestart("muffleWarning")) 6: suppressWarnings(.shp2LinesDF(Map, proj4string = proj4string)) 5: readShapeLines(fn = "D:\\GIS\\road2004.shp") 4: .class1(object) 3: as(readShapeLines(fn = "D:\\GIS\\road2004.shp"), "SpatialLines") 2: .class1(object) 1: as(as(readShapeLines(fn = "D:\\GIS\\road2004.shp"), "SpatialLines"), "psp") [[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