To all moderators i guess, my question was probably not clear this is not a homework, i am trying to understand R by doing some exercise in my book. I will however participate a course in R in august and thought it could be good to have some knowledge before. I hoped for help from you since i have no instructor to ask, that would have been my first choice. thanks anyway Lotta
------------------------------------------------------------------------------------ Eva-Lotta Blom PhD student Dept. of BioEnv . Tjärnö University of Gothenburg 452 96 Strömstad Sweden +46 706 658089 [[alternative HTML version deleted]]
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