v10.0.0

DataInterpolations v10.0.0

Diff since v9.5.0

Breaking

This major re-labels API that has been shipping in the 9.x series since 9.2.0 (2026-08-05). No new
breaking change is introduced here; the version number is being corrected so that
DataInterpolations = "9" bounds no longer resolve to it.

• Curvefit migrated from Optim.jl to CurveFit.jl (#506). The optimizer argument and the
  fitted-object internals changed with it.
• BSplineInterpolation / BSplineApprox reparameterized (#511). The simpler parameterization
  changes constructed knot vectors and coefficients, so fitted objects and their numeric output
  differ from 9.1.x.

Added

• Symbolic-array support in the interpolation caches and utilities: ifelse in place of branching
  so u may hold Symbolics.Num entries, and reshape-based solves so Symbolics.Arr inputs
  actually solve instead of returning an unevaluated term.
• du_PCHIP methods for matrices and vector-of-vector responses, matching the
  AkimaInterpolation pattern.

Fixed

• Interval lookup at knots with ForwardDiff 1 Dual inputs searches on the primal via
  search_value, so a Dual query no longer selects the wrong interval.

Merged pull requests:

• Release 10.0.0 (#595) (@ChrisRackauckas)

Closed issues:

• Inconsistency in Interface (#206)