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mxIsLogical (C and Fortran)

Determine whether array is of type mxLogical

C Syntax

#include "matrix.h"
bool mxIsLogical(const mxArray *pm);

Fortran Syntax

integer*4 mxIsLogical(pm)
mwPointer pm



Pointer to an mxArray


Logical 1 (true) if pm points to a logical mxArray. Otherwise, it returns logical 0 (false).


Use mxIsLogical to determine whether MATLAB® software treats the data in the mxArray as Boolean (logical). If an mxArray is logical, MATLAB treats all zeros as meaning false and all nonzero values as meaning true.


See the following examples in matlabroot/extern/examples/mx.

See Also

More About

Introduced before R2006a

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