R help - Jan 2006 - How to use filled.contour(x,y,z) data for levelplot(z)?

Dear all,

We used the following function to create a spatial plot of a raster image:

filled.contour(xx,yy,zz, color = terrain.colors, nlevels=10,
main=naamjaar, plot.axes = { contour(Xcoord/1000,Ycoord/1000,lim.data,
nlevels = 4, col=4,drawlabels = T, axes = FALSE, frame.plot = FFALSE,
add = TRUE);axis(1); axis(2);                        
points(fire[,2:3]/1000,col="red",pch="*",cex=2,lwd=3)
                                })

we however would like to create 5 maps with only one legend. This seems
not to be possible with filled.contour follow the help().

We therefore started looking at levelplot(zz) to create a multipanel view.  

*However how could we use x and y coordinates in levelplot without using
a formula (since x,y are only the coordinates of the matrix z)?

libary(lattice)
rownames(zz) <- xx
colnames(zz) <- yy
levelplot(zz)

like this the all the row and col names are displayed in x and y axis
without summarizing data similar to filled.contour function?

* or can this be done with an upgrade of filled.contour?

Thanks,
Jan

windows R 2.2


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Jan, 

libary(lattice)
rownames(zz) <- xx
colnames(zz) <- yy
levelplot(zz)

will not work -- levelplot needs a data frame with
zz, xx and yy values next to each other, so read
about data.frame(), rep() and as.vector(zz); you
will need the each= argument for one of xx or yy.

Sounds like you'd be helped by using package sp, 
see also http://r-spatial.sourceforge.net/ and look
for the graph gallery, function spplot.
--
Edzer