mxClassID (External Interfaces/API Reference)

Enumerated data type that identifies an mxArray's class (category)

C Syntax

typedef enum {
        mxUNKNOWN_CLASS = 0,
        mxCELL_CLASS,
        mxSTRUCT_CLASS,
        mxOBJECT_CLASS,
        mxCHAR_CLASS,
        mxLOGICAL_CLASS,
        mxDOUBLE_CLASS,
        mxSINGLE_CLASS,
        mxINT8_CLASS,
        mxUINT8_CLASS,
        mxINT16_CLASS,
        mxUINT16_CLASS,
        mxINT32_CLASS,
        mxUINT32_CLASS,
        mxINT64_CLASS, /* place holder - future enhancements */
        mxUINT64_CLASS, /* place holder - future enhancements */

mxFUNCTION_CLASS

```
} mxClassID;
```

Constants

mxUNKNOWN_CLASS
The class cannot be determined. You cannot specify this category for an mxArray; however, mxGetClassID can return this value if it cannot identify the class.

mxCELL_CLASS
Identifies a cell mxArray.

mxSTRUCT_CLASS
Identifies a structure mxArray.

mxOBJECT_CLASS
Identifies a user-defined (nonstandard) mxArray.

mxCHAR_CLASS
Identifies a string mxArray; that is an mxArray whose data is represented as mxCHAR's.

mxLOGICAL_CLASS
Identifies a logical mxArray; that is, an mxArray that stores Boolean elements, true and false.

mxDOUBLE_CLASS
Identifies a numeric mxArray whose data is stored as double-precision, floating-point numbers.

mxSINGLE_CLASS
Identifies a numeric mxArray whose data is stored as single-precision, floating-point numbers.

mxINT8_CLASS
Identifies a numeric mxArray whose data is stored as signed 8-bit integers.

mxUINT8_CLASS
Identifies a numeric mxArray whose data is stored as unsigned 8-bit integers.

mxINT16_CLASS
Identifies a numeric mxArray whose data is stored as signed 16-bit integers.

mxUINT16_CLASS
Identifies a numeric mxArray whose data is stored as unsigned 16-bit integers.

mxINT32_CLASS
Identifies a numeric mxArray whose data is stored as signed 32-bit integers.

mxUINT32_CLASS
Identifies a numeric mxArray whose data is stored as unsigned 32-bit integers.

mxINT64_CLASS
Reserved for possible future use.

mxUINT64_CLASS
Reserved for possible future use.

mxFUNCTION_CLASS
Identifies a function handle mxArray.

Description

Various mx calls require or return an mxClassID argument. mxClassID identifies the way in which the mxArray represents its data elements.

Examples

See explore.c in the mex subdirectory of the examples directory.

See Also

mxCreateNumericArray

mxChar mxClearLogical (Obsolete)