[R-sig-Geo] customize tick in plot(raster)

[Giuseppe Amatulli]

Hi,
I'm trying to customize xlabel and relative ticks for a raster plot

library(raster)
raster=raster(matrix(runif(100)))
plot(raster ,  xlab="" , ylab=""  ,  yaxt="n" ,  xaxt="n" ,  xpd=NA  )

using

axis(side = 1, tck = -0.1, xpd=NA)

the ticks does not appear outside the plotting region rather if I use

axis(side=1, tck=0.1 , xpd=NA)

the ticks appear inside the plotting region

The same procedure works fine for a normal plot

plot(c(1,1) ,  xlab="", ylab="",  yaxt="n",  xaxt="n",  xpd=NA  )
axis(side = 1,    tck = -0.1 , xpd=NA )

Does anyone know how to customize the par() settings in order to be able to
plot outside the raster-plotting region?

Thanks in advance

-- 
Giuseppe Amatulli, Ph.D.

Department of Ecology and Evolutionary Biology, Yale University.
Jetz Lab, OML Room 405

P.O. Box 208106
165 PROSPECT ST
New Haven, CT 06520-8106
Teaching: spatial-ecology.net
Work:  http://sbsc.yale.edu/giuseppe-amatulli
<http://www.spatial-ecology.net>

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