interp_poly opsignal × signal × signal → signalimport fullseye as fs; fs.ledger.interp_cubic(x, y, xq, out_of_range='raise', bc_type='not-a-knot') (実装を直接呼ぶなら import mathops; mathops.interp_cubic(x, y, xq, out_of_range='raise', bc_type='not-a-knot')、台帳から引くなら opsmath.get("interp_cubic"))Cubic-spline interpolation (scipy.interpolate.CubicSpline).
C²-smooth through all nodes — the step up from :func:interp_linear when
the underlying curve is smooth (a lens-distortion or gamma curve). Needs at
least 4 points. bc_type is the boundary condition: 'not-a-knot'
(default — reproduces a global cubic polynomial exactly, the property the
tests pin), 'natural' (zero second derivative at the ends; slightly
smoother-looking, but it will NOT reproduce a cubic), or 'clamped'.
Same strict grid and the same explicit out_of_range policy as
:func:interp_linear (‘raise’ by default, ‘clamp’ to hold end values) —
spline extrapolation diverges cubically and is refused outright.
Honest note: between nodes a spline can overshoot (it is a minimum- curvature interpolant, not shape-preserving); for monotone data whose interpolant must stay monotone, use a PCHIP-type method instead — not provided here, stated so nobody assumes otherwise.
HALCON: no cubic tuple interpolation operator (create_funct_1d_pairs
feeds linear interpolation only).
mathops の全 op は入力を検証してから計算する(黙って通さない):
ValueError — float64 への強制変換は虚部を黙って捨てる(numpy は ComplexWarning だけ出して「もっともらしく間違った」実数を返す)。.real/.imag/abs() を明示するか、複素対応の complexops を使う。ValueError — マスクを剥がして下の生値を使う暗黙変換を拒否。埋める/落とすを明示する。ValueError(件数を明示して拒否 — 結果全体に伝播するため)。ValueError。reshape を明示する)。stat_histogram の bins は mathops.MAX_ELEMENTS(2^26 ≈ 6700 万要素)超で ValueError。py -3.11 examples/math_metrology.pysignal を入力に取れる)mat_solve · mat_lstsq · stat_describe · stat_histogram · stat_zscore · interp_linear · interp_scattered · poly_fit
interp_poly)interp_linear · interp_scattered · poly_fit · poly_eval · poly_roots
Provenance: mathops.py — MATH operator registry. この per-op ノートは tools/opdocs.py md が自動生成(手編集しない)。
© 2026 Kazufumi Furuse — Fullseye operator documentation. Licensed under Apache-2.0.