TEC_IO
Read and Write TEC Files

TEC_IO is a MATLAB library which can read or write a TEC graphics file containing a finite element model.

There are several kinds of TEC files; the routines given here can only handle the case where a single ZONE record is used to define finite element data, using a DATAPACKING value of "POINT" (not "BLOCK"), and a ZONETYPE of

• FETRIANGLE
• FEQUADRILATERAL
• FETETRAHEDRON
• FEBRICK

The data to be written or read is assumed to have a logical organization into three groups:

• Node coordinate data;
• Element definitions, that is, the sequence of node indices that define each element;
• Node data, such as finite element coefficients for pressure, velocity, and so on.

The TECPLOT home page contains a description of the TECPLOT program.

Licensing:

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

Languages:

TEC_IO is available in a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

FEM_50, a MATLAB program which implements a finite element solver in just 50 lines of code.

FEM_50_HEAT, a MATLAB program which is a modified version of FEM_50 suitable for solving the heat equation.

FEM_IO, a MATLAB library which reads or writes an FEM model.

FEM_TO_TEC, a MATLAB program which reads the three files defining an FEM model and writes an equivalent TEC file.

FEM2D, a data directory which contains examples of 2D FEM files, text files that describe a 2D finite element geometry and associated nodal values;

FEM2D_PACK, a MATLAB library which is useful for finite element calculations.

FEM2D_POISSON, a MATLAB program which solves Poisson's equation on a square, using the finite element method.

HOT_PIPE, a MATLAB library which can be run with FEM_50_HEAT.

HOT_POINT, a MATLAB library which can be run with FEM_50_HEAT.

TEC, a data directory which contains a description and examples of the TEC graphics files used by TECPLOT

TEC_TO_FEM, a MATLAB program which reads a TEC file and writes a set of three files defining the equivalent FEM model.

Source Code:

• ch_cap.m capitalizes a character.
• ch_eqi.m is TRUE if two characters are equal, ignoring case.
• ch_is_alpha.m is TRUE if a character is alphabetic.
• file_name_inc.m "increments" a file name.
• i4mat_transpose_print_some.m prints an I4MAT, transposed.
• i4mat_transpose_print_some.m prints some of an I4MAT, transposed.
• r8_epsilon.m returns the R8 machine precision.
• r8mat_transpose_print.m prints an R8MAT, transposed.
• r8mat_transpose_print_some.m prints some of an R8MAT, transposed.
• s_adjustl.m shifts a string to the left, removing initial blanks.
• s_alpha_last.m finds the last alphabetic character in a string.
• s_begin.m is TRUE if two strings match up to the end of the shorter one, ignoring spaces and capitalization.
• s_behead_substring.m beheads a substring from the beginning of a string, if it occurs there.
• s_eqi.m returns "TRUE" if two strings are equal, ignoring case.
• s_inc.m "increments" a string.
• s_len_trim.m returns the length of a string to the last nonblank.
• s_replace_ch.m replaces all occurrences of one character by another character.
• s_to_i4.m converts a string to an I4.
• s_word_count.m counts the number of words in a string.
• s_word_extract.m extracts the first word from a string.
• tec_read.m reads the information from a TEC file.
• tec_variable_line_parse.m parses the "variables" line of a TEC file.
• tec_write.m writes information to a TEC file.
• tec_zone_line_parse.m parses the "zone" line of a TEC file.
• timestamp.m prints the current YMDHMS date as a timestamp.

Examples and Tests:

• tec_io_test.m runs the tests.
• tec_io_test01.m tests TEC_READ by reading "ell.dat";
• tec_io_test02.m tests TEC_WRITE by writing "tiny.dat";
• tec_io_test_output.txt printed output from the tests.
• ell.dat, a TECPLOT ASCII file read by the test program;
• tiny.dat, a TECPLOT ASCII file created by the test program;

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