[PATCH 2/2] gas model: replace Redlich-Kwong with least-square quintic

[Lubomir I. Ivanov]

On 3 March 2016 at 02:07, Lubomir I. Ivanov <neolit123 at gmail.com> wrote:
>
> so for instance, the tables start at 7 bars and end at 276 bars, but
> if the input is 1 bar or something like 500 bars, the value might not
> follow the fitted curve to the data set and deviate. this is usually
> worse with something like Lagrangian interpolation, tolerable to quite
> bad with polynomial regression and pretty good with splines (but
> splines are expensive and i don't have a ready algorithm / website for
> them).
>

erm, bad wording. Lagrangian interpolation is a polynomial regression.
i meant, compared to something like the least-squares method.

the Lagrange polynomial tends to deviate *a lot*.

lubomir
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