spinterp 0.1.0

Sparse Grid Interpolation Toolbox for Python

spinterp

Sparse Grid Interpolation Toolbox for Python

Sparse Grid Interpolation Toolbox for Python.

Grid types

Grid type	Basis	Max depth
Clenshaw-Curtis	Piecewise linear	8
Chebyshev	Polynomial (DCT)	10
Gauss-Patterson	Nested Gaussian	6
Maximum	Piecewise linear	8
NoBoundary	Piecewise linear	8

Routines

Fortran subroutine	Python binding	Description
SPVALS	spvals	Compute hierarchical surpluses
SPINTERP	spinterp	Evaluate interpolant (and gradient) at points
SPQUAD	spquad	Integrate interpolant over domain
SPGRID	spgrid	Return sparse grid node coordinates
SPGETSEQ	spgetseq	Generate multi-index level sequences

Quick example

import spinterp

z = spinterp.spvals(lambda x, y, t: x**2 + y**2 - 2 * t, d=3)
f = spinterp.spinterp(z, 0.5, 0.2, 0.2)
q = spinterp.spquad(z)

Installation

pip install spinterp

Requires Python 3.10+ and NumPy.

Build from source

python bin/build.py install   # build and install via uv
python bin/build.py wheel     # produce a wheel in dist/
python bin/build.py clean     # remove all build artifacts

Requires gfortran, Meson, and f2py (numpy).

Documentation

• Theory — hierarchical basis, Smolyak construction, algorithms
• Quickstart — runnable examples
• API Reference — function signatures and arguments
• References — literature citations

License

GNU General Public License v3 (GPLv3) — see LICENSE.