I have uploaded lesson-2 on data frames and basic statistics. The correct way to learn R is by jumping into the water. Do use a book or just the built-in help system ( the R complete reference manual is ~3000 pages long). Try to complete the assignment in ~14 days. Best A. Mani -- A. Mani ASL, CLC, AMS, CMS http://www.logicamani.co.cc