Average Node Data to Create Element Data

TRIANGULATION_NODE_TO_ELEMENT is a FORTRAN77 program which reads datafiles describing a set of nodes, their triangulation, and the value of one or more quantities at each node, and outputs a file that averages the quantities for each element. This operation in effect creates an "order1" finite element model of the data.

The program reads three data files:

and creates


triangulation_node_to_element prefix


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


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

Related Data and Programs:

MESH_TO_XML, a FORTRAN77 program which reads information defining a 1D, 2D or 3D mesh, namely a file of node coordinates and a file of elements defined by node indices, and creates a corresponding XML file for input to DOLFIN or FENICS.

TRIANGULATION, a FORTRAN77 library which carries out various operations on order 3 ("linear") or order 6 ("quadratic") triangulations.

Source Code:

Examples and Tests:

List of Routines:

You can go up one level to the FORTRAN77 source codes.

Last revised on 19 March 2014.