Using the C++ Math Library

Importing Array Data from a MAT-File

Using load(), you can read in mwArray data from a binary MAT-file. The prototype for load() is:

void load( const mwArray &file,
    const char* name1, mwArray *var1,
    const char* name2=NULL, mwArray *var2=NULL,
    .
    .
    .
    const char* name16=NULL, mwArray *var16=NULL );

file contains the name of the MAT-file. You must pass at least one pair of arguments indicating the name of a variable that you want to load and a pointer to an mwArray variable that will receive the data:

• You must indicate the name of each mwArray object that you want to load.
• You can load up to 16 mwArray objects in one call to load().
• There is no call that globally loads all variables from a MAT-file.
• You do not have to allocate space for the incoming mwArray.  load() allocates the space required based on the size of the variable being read.
• You must specify a full path for the file that contains the data. If you do not specify the .mat extension, the library automatically appends it to the filename.
• You must load data from a binary MAT-file, not an ASCII MAT-file.

Note    Be sure to transmit MAT-files in binary file mode when you exchange data between machines.

For more information on MAT-files, consult the MATLAB Application Program Interface Guide.

Exporting Array Data to a MAT-File

Example - Using load() and save() (ex7.cpp)