How is R-square calculated in curve fitting tool for LAR and bisqaure robust fit option?
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I find that for a polynomial fit with Bisquare or LAR robust fit option, the r-square value I calculate doesn't match with the curve fitting tool result. does the curve fitting tool use a different formulation than the one explained in here?
ME on 20 Dec 2019
Does this link help at all?
It looks like LAR doesn't so much minimise an R^2 value but rather minimises the absolute differences. Could that be your issue and why they don't match?