My Linux installation of R is x86_64-redhat-linux-gnu-library When I tried to write a tiff file the system responded that tiff was not supported with this version. Which version of R on a linux environment does support tiff graphic files ? Thank you Steve Steve Friedman Ph. D. Spatial Statistical Analyst Everglades and Dry Tortugas National Park 950 N Krome Ave (3rd Floor) Homestead, Florida 33034 Steve_Friedman at nps.gov Office (305) 224 - 4282 Fax (305) 224 - 4147