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matOpen (C and Fortran) - Open MAT-file

C Syntax

#include "mat.h"
MATFile *matOpen(const char *filename, const char *mode);

Fortran Syntax

mwPointer matOpen(filename, mode)
character*(*) filename, mode

Arguments

filename

Name of file to open

mode

File opening mode. Valid values for mode are listed in the following table.

`r`	Opens file for reading only; determines the current version of the MAT-file by inspecting the files and preserves the current version.
`u`	Opens file for update, both reading and writing, but does not create the file if the file does not exist (equivalent to the `r+` mode of `fopen`); determines the current version of the MAT-file by inspecting the files and preserves the current version.
`w`	Opens file for writing only; deletes previous contents, if any.
`w4`	Creates a Level 4 MAT-file, compatible with MATLAB Versions 4 software and earlier.
`wL`	Opens file for writing character data using the default character set for your system. The resulting MAT-file can be read with MATLAB Version 6 or 6.5 software. If you do not use the `wL` mode switch, MATLAB writes character data to the MAT-file using Unicode^® character encoding by default.
`wz`	Opens file for writing compressed data.
`w7.3`	Creates a MAT-file in an HDF5-based format that can store objects occupy more than 2 GB.

Returns

File handle, or NULL in C (0 in Fortran) if the open fails.

Description

This routine opens a MAT-file for reading and writing.

See Writing Character Data in the External Interfaces documentation for more information on how MATLAB uses character encodings.

C Examples

See matcreat.c and matdgns.c in the matlabroot/extern/examples/eng_mat folder for sample programs that illustrate how to use the MAT-file routines in a C program.

Fortran Examples

See matdemo1.F and matdemo2.F in the matlabroot/extern/examples/eng_mat folder for sample programs that illustrate how to use the MAT-file routines in a Fortran program.

matGetVariableInfo (C and Fortran)

matPutVariable (C and Fortran)

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