I have successfully power fit the relationship between two variables using lm() with poly(x,2) argument via a package from a prof of mine, and now I would like to add the poly curve to the existing scatterplot; how do I do this in the simplest way?
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2see `?predict` ... ? – Ben Bolker Jun 18 '15 at 14:10
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I have tried using the predict arguments, but inevitably end up with a birds nest. I worked around with this code, but it seems overly messy and verbose. lmpol – Ivan Haworth Jun 19 '15 at 15:04