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...es in each plot category which would look like: BU3F10 BU3F11 BU3F12 1 2 4 I understand, from reading the archive, that this occurs because R does not subset factor levels, but I'm wondering if there's a simple way around this. Thanks for your help, Ian Chidister Environment and Resources The Nelson Institute for Environmental Studies University of Wisconsin-Madison, USA [[alternative HTML version deleted]]

hello everybody i'm very new at using R so probably this is a very stupid question. I have a problem calculating a p-value. When i do this with excel i can use the method CHIDIST for 1.2654 with 1 freedom degree i get the answer 0.261 i just want to do the same thing in R but i can't find a method. can somebody help me friendly regards richard