Hello, I am fairly new to PDL and I have gotten the fitpoly1d routine working (PDL::Fit::Polynomial). Unfortunately I have not found any documentation on what the output is. I am calling the function as follows:
($yfit, $coeffs)=fitpoly1d $x, $y, 3 The goal is to fit some data to a quadratic. The output I get looks like: $yfit=[# # # #] $coeffs=[# # #] It is not obvious to me from the description on CPAN or the PDL documentation what the values in $yfit are. Also it is not obvious what order it is returning the coefficients in. For the above example the coefficients are a*x^2+b*x+c, however I don't know if the coefficients are [a b c] or [c b a] or something else entirely. If you have any knowledge about the output of this function please let me know. Thank you, -- Gregory Petropoulos
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