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Hi, I am trying to fit a logarithmic trendline to a scatterplot of a species accumulation curve. I've tried abline, lines, curve and scatter.smooth but none of these work. Can anyone help please, Kyran

...utions involving setting R_LIB in the .REnviron to the user library but I am unsure as to how to do this; is this done in the R program itself or through other means? I am running 32-bit Windows 7, R version 2.15.1 Again, sorry for the repeat question but setting directories is not my strong point. Kyran. -- Kyran Graham (PhD Candidate) School of Medicine & Pharmacology, University of Western Australia (M510) 35 Stirling Highway Crawley, WA 6009 Centre for Clinical Research in Neuropsychiatry, Graylands Hospital Private Bag No 1 Claremont, WA 6910 Phone: 9347 6430 Email: grahak02@student.uwa....

...n see the slopes easily enough and I understand that the intercept is the overall mean for the data, and not the intercept for the covariates age and PLE. Do I need to alter my model in order to calculate separate intercepts for each of the covariates and, if so, how? Thanks for your help! -- Kyran Graham (PhD Candidate) School of Medicine & Pharmacology, University of Western Australia (M510) 35 Stirling Highway Crawley, WA 6009 Centre for Clinical Research in Neuropsychiatry, Graylands Hospital Private Bag No 1 Claremont, WA 6910 Phone: 9347 6430 Email: grahak02@student.uwa.edu.au [[a...