[R-sig-Geo] image classification in R

[Corey Sparks]

Dear list,
I want to do some unsupervised image classification of some landsat  
imagery, I think I can read in the multi-band rasters using rgdal, but  
has anyone tried doing this in R?  I am thinking (after looking at  
documentation for how GRASS and ArcGIS do it) that I need to do an  
initial hierarchical clustering to define clusters, but does anyone  
have an idea on how to do a maximum likelihood classification of the  
imagery?  Would a discriminant function approach work?  Any advice  
anyone may have would be greatly appreciated, and i'm very sorry but I  
don't have a working example yet.
Best

Corey

Corey Sparks
Assistant Professor
Department of Demography and Organization Studies
University of Texas at San Antonio
One UTSA Circle
San Antonio, TX 78249
210 458 6858
corey.sparks 'at' utsa.edu