Interpolations with (different) boost units

[sebweb3r]

Hey,

we (a physics group) are using the boost math (Barycentric Rational Interpolation and others) with boost units for our code. We have the problem, that the interpolation expects the same type for x and y data. In physics we quiet often have different units.

Could you extend the templates for different types/units for x and y.

Thanks in advance.

[NAThompson]

Yes, I think that's fine. Could you give me a main I could try to get working?

BTW, I recommend pchip or makima interpolation over barycentric rational for almost all uses (log(N) complexity rather than O(N), with less spurious oscillations).

[L0ric0]

i think something like this would be nice: https://github.com/L0ric0/boostorg-mat-issue-314

it could be that i was wrong with the template arguments for boost::math::barycentric_rational<quantity<si::energy, double>, quantity<si::electric_charge, double>> but they should be the types of the axes for the function to interpolate.