[R-sig-Geo] plot shape file using lattice xyplot

[Felix Andrews]

What's wrong with using spplot? It is based on xyplot anyway.

If you want to use xyplot, you can use the panel function that sp defines:
sp.polygons(shp)

You can read in the shapefile with the RGDAL package:
shp <- readOGR(...)


2009/12/17 Zia Ahmed <zua3 at cornell.edu>:
> Hi,
>
> I am trying to plot a shape file  in R. I can do  it easily using plot or
> spplot function.  But I want plot this map with  lattice xyplot function.
> Any one has any idea? I do not want use "maps" package.
>
> Help will be appreciated...
>
> Thanks
>
> Zia
>
> library(maptools)
> library(lattice)
> bound<-read.shape("Boundary.shp")
> #OR
> bound<-readShapePoly("Boundary.shp")
> plot(bound)
> spplot(bound)
>
> # Or following way
>
> bound<-Map2poly(bound)
> xybd<-attr(bound,"maplim")
>
> plot(xybd$x,xybd$y, type="n",asp=1, xlab="", ylab="")
> for (i in 1:length(bound)) lines(bound[[i]]) # How do I apply this code in
> following  panel.function of  xyplot?
>
>
> windows(width=5, height=5)
> xyplot(y~x, as.data.frame(tala),pch=1, cex=.8,col="black",
>      xlab=list("Easting (m)",cex=.9),ylab=list("Northing (m)",cex=.9),
>      aspect = "iso",
>      panel = function(...) {
>             panel.xyplot(...)
>             panel.abline(h = 0:4*5000 + 545000, v= 0:4*5000 + 2650000,
>             col = "light grey")
>             panel.points(coordinates(tala.nr),cex=.95,pch=20, col="black")
>             panel.text(2671000, 563000, cex=1, " (a)")
>             },
> )
>
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>



-- 
Felix Andrews / 安福立
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Integrated Catchment Assessment and Management (iCAM) Centre
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The Australian National University
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