F77_CALLS_MATLAB
FORTRAN77 Programs Interacting with MATLAB

F77_CALLS_MATLAB is a FORTRAN77 program which can interact with MATLAB.

In these examples, the interaction is done through the SYSTEM command, which allows a FORTRAN77 program to issue a command to the operating system, and to receive a result flag indicating the successful completion or failure of that command.

The SYSTEM command is not a standard or intrinsic routine defined by the FORTRAN standard. However, it is often available to FORTRAN programmers on UNIX systems. In particular, the GNU GFORTRAN and IBM XLF compilers include this routine.

Data can be passed between MATLAB and FORTRAN using text files.

Licensing:

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

Languages:

F77_CALLS_MATLAB is available in a FORTRAN77 version and a FORTRAN90 version.

Related Data and Programs:

C_CALLS_F77, C programs which illustrate a C program calling a FORTRAN77 subroutine.

C++_CALLS_F77, C++ programs which illustrate how a C++ main program can call a FORTRAN77 subroutine.

F77_CALLS_C, FORTRAN77 programs which illustrates how a FORTRAN77 program can call a C function.

F77_CALLS_C++, FORTRAN77 programs which illustrates how a FORTRAN77 program can call a C++ function.

MATLAB_CALLS_C, MATLAB programs which illustrate how C functions can be written, compiled, and called from MATLAB using the MEX facility;

MATLAB_CALLS_F77, MATLAB programs which illustrate how FORTRAN77 functions can be written, compiled, and called from MATLAB using MATLAB's mex facility;

Reference:

1. Duane Hanselman, Bruce Littlefield,
   Mastering MATLAB 7,
   Pearson Prentice Hall, 2005,
   ISBN: 0-13-143018-1.
2. The Mathworks,
   Using MATLAB, Version 6,
   The Mathworks, 2002.

Examples and Tests:

MATRIX_MULTIPLY shows how a FORTRAN77 program can cooperate with MATLAB. The FORTRAN77 program generates two matrices A and B, writes them to files, and invokes MATLAB with a particular M-file. The M-file reads the matrices from the files, computes the product C and writes it to a file. The FORTRAN77 program resumes execution, reading the C file and reporting the result.

• matrix_multiply.f, a program that generates matrices A and B, writes them to a file, runs MATLAB with the MATRIX_MULTIPLY.M file, and retrieves the product matrix C.
• matrix_multiply.sh, BASH commands to compile and load the FORTRAN77 program.
• matrix_multiply.m, a MATLAB script that reads matrices A and B from a file, computes the product C, and writes it to a file.
• r8mat_read.m, a MATLAB M-file that reads a matrix from a file.
• r8mat_write.m, a MATLAB M-file that writes a matrix to a file.
• matrix_multiply_f77_output.txt, the output file from the FORTRAN77 program;
• matrix_multiply_matlab_output.txt, the output file from the MATLAB program;
• a.txt, the A matrix written by the FORTRAN program;
• b.txt, the B matrix written by the FORTRAN program;
• c.txt, the C matrix written by the MATLAB script;

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