toms661

toms661, a FORTRAN77 code which interpolates scattered 3D data, also known as qshep3d(), by Robert Renka.

toms661 takes a set of data values WDAT(XDAT,YDAT,ZDAT), where the points (XDAT,YDAT,ZDAT) are "scattered" in 3D, and constructs an interpolating function W(X,Y,Z) which matches the given data and extends smoothly through 3D space.

toms661 is ACM Transactions on Mathematical Software Algorithm number 661. The original text of any ACM toms algorithm is available through ACM: http://www.acm.org/pubs/calgo or NETLIB: http://www.netlib.org/toms/index.html

Licensing:

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

Languages:

toms661 is available in a FORTRAN77 version and a FORTRAN90 version.

Related Data and Programs:

toms661_test

rbf_interp_nd, a FORTRAN77 library which defines and evaluates radial basis interpolants to multidimensional data.

toms660, a FORTRAN77 library which takes scattered 2D data and produces an interpolating function F(X,Y).

Author:

Original Fortran77 version by Robert Renka. This version by John Burkardt.

Reference:

1. Robert Renka,
   Algorithm 661: QSHEP3D, Quadratic Shepard method for trivariate interpolation of scattered data,
   ACM Transactions on Mathematical Software,
   Volume 14, 1988, pages 151-152.

Source Code:

• toms661.f, the source code.
• toms661.sh, commands to compile the source code.