pwl_interp_1d

pwl_interp_1d, an Octave code which interpolates a set of data with a piecewise linear (PWL) function.

The test code needs the R8LIB and TEST_INTERP libraries.

Licensing:

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

Languages:

pwl_interp_1d is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Data and Programs:

pwl_interp_1d_test

newton_interp_1d, an Octave code which finds a polynomial interpolant to data using Newton divided differences.

test_interp, a MATLAB code which defines a number of test problems for interpolation, provided as a set of (x,y) data.

Reference:

1. Kendall Atkinson,
   An Introduction to Numerical Analysis,
   Prentice Hall, 1989,
   ISBN: 0471624896,
   LC: QA297.A94.1989.
2. Philip Davis,
   Interpolation and Approximation,
   Dover, 1975,
   ISBN: 0-486-62495-1,
   LC: QA221.D33
3. David Kahaner, Cleve Moler, Steven Nash,
   Numerical Methods and Software,
   Prentice Hall, 1989,
   ISBN: 0-13-627258-4,
   LC: TA345.K34.

Source Code:

• pwl_basis_1d.m, evaluates a piecewise linear interpolant basis function.
• pwl_value_1d.m, evaluates a piecewise linear interpolant.