These two are mutual companions, refreshed.
Observe in "holisic" => algo style A(X), S(X,Y), plugged in utilities.
This particular example is the one that inspired Akima [ainterp].

Jean

Spline Quadratic Holistic RECONCILIATION.sm (62 KiB) downloaded 71 time(s).
Spline Quadratic Holistic.sm (84 KiB) downloaded 70 time(s).