Test Interpolation Data Z(X,Y) of a 2D Argument

TEST_INTERP_2D is a Python library which defines test problems for interpolation of data z(x,y) depending on a 2D argument.


The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.


TEST_INTERP_2D is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version and a Python version.

Related Data and Programs:

PADUA, a Python library which returns the points and weights for Padu sets, useful for interpolation in 2D.

TEST_INTERP, a Python library which defines a number of test problems for interpolation, provided as a set of (x,y(x)) data.

TEST_INTERP_1D, a Python library which defines test problems for interpolation of data y(x), depending on a 2D argument.


  1. Richard Franke,
    A Critical Comparison of Some Methods for Interpolation of Scattered Data,
    Naval Postgraduate School Technical Report,
    NPS-53-79-003, 1979.
  2. Robert Renka, Ron Brown,
    Algorithm 792: Accuracy Tests of ACM Algorithms for Interpolation of Scattered Data in the Plane,
    ACM Transactions on Mathematical Software,
    Volume 25, Number 1, March 1999, pages 78-94.
  3. Donald Shepard,
    A two-dimensional interpolation function for irregularly spaced data,
    ACM '68: Proceedings of the 1968 23rd ACM National Conference,
    ACM, pages 517-524, 1969.

Source Code:

test_interp_2d_test03 makes plots of each grid:

You can go up one level to the Python source codes.

Last revised on 10 December 2016.