Most interesting for high quality publishing.
As it looks X_Y Dot subdivides the point intervals.
On what criteria the sub-intervals ?
The spline junction ? Most probably Bézier [Excel style].

Jean

Utilities Matrix Create Sr(X,Y,Z,s0,s1,t0,t1,xmesh,ymesh) GaussianMultitrace.sm (39 KiB) downloaded 93 time(s).