Hi Younes Although ArcGIS has a monopoly on the geostat analyst and outside of academia, it is hard to find users of Matlab, R, etc...it is possible to combine a GIS graphical User Interface with modeling software. For instance, ArcEngine can be used to create standalone applications containing some interesting GIS features and functions, and can be "linked" to geostatistical modeling software (R, Matlab) through the use of COM objects or dynamic linked libraries (dlls)...some sort of a hybrid possibility between the two.
eric -- geoearth.uncc.edu Charlotte, NC 28223 (704) 687 5991 --