[R-sig-Geo] RE: [R] adjacency matrix

[Stephane DRAY]

Have you install the shapefiles library on your computer ??


At 12:56 23/10/2003, Orlando Zacarias wrote:

>a77632.gif
>
>Hi once again,
>Now i have been trying to run the R changed example from Maptools package 
>manual, and errors occur underlined bellow. It is really troublesome....
>Please assist,
>Orlando.
>---------------------------------------------------
>shp <- try(library(shapefiles))
>Error in library(maptools) : There is no package called 'shapefiles'
> > if (class(shp) != "try-error") {
>+ ShapeDir <- system.file("shapes", package="maptools")[1]
>+ try1 <- read.shapefile(paste(ShapeDir, "shapes", sep="/"))
>+ shppolys <- shape2poly(try1, as.character(try1$dbf$dbf$NEIGNO))
>+ plotpolys(shppolys)
>+ title(main="Polygons for Vermani from shapefiles package")
>+ }
> >
> > try2 <- read.shape(system.file("shapes/Vermani.shp",
>+ package="maptools/man")[1])
>Error: couldn't find function "read.shape"
> > mappolys <- Map2poly(try2, as.character(try2$att.data$NEIGNO))
>Error: couldn't find function "Map2poly"
> > plotpolys(mappolys)
>Error: couldn't find function "plotpolys"
> > title(main="Polygons for Vermani from maptools package")
>Error in title(main = "Polygons for Vermani from maptools package") :
>         plot.new has not been called yet
> > if (class(shp) != "try-error") {
>+ plotpolys(shppolys)
>+ plotpolys(mappolys, add=TRUE, border="red", lty="dotted")
>+ title(main="Polygons for Vermani overplotted from both packages")
>+ }
>------------------------------------------------------
>
>a77678.gif
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