Hi Jason,

if your maps is on asc format try:

install.packages("adehabitat", dependencies=T)
require(adehabitat)

setwd("c:\\temp\\")  #pay attention on double backslash
mymap<-import.asc("map1.asc")

image(mymap)
may be plot(mymap)

cheers

milton
brazil=toronto

On Fri, Jul 31, 2009 at 2:21 PM, Jason Robinson <litobrancha@yahoo.com>wrote:

>
> I need to do some raster algebra on some large rasters.  right now they are
> ascii files.  I'm a complete R novice.  Can anyone point me towards a good
> source for figuring out how to get my data into R and how to do very simple
> raster manipulations?  no advice is too simple for this guy.  appreciate any
> help that is out there
>
> Jason Robinson
>
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