External Interfaces/API Reference

mxIsLogical

True if mxArray is Boolean

Fortran Syntax

• integer*4 function mxIsLogical(pm)
  integer*4 pm
  

Arguments

pm
   Pointer to an mxArray.

Returns

1 if the mxArray's logical flag is on, and 0 otherwise. If an mxArray does not hold numeric data (for instance, if pm points to a structure mxArray or a cell mxArray), then mxIsLogical automatically returns 0.

Description

Use mxIsLogical to determine whether MATLAB treats the data in the mxArray as Boolean (logical) or numerical (not logical).

If an mxArray is logical, then MATLAB treats all zeros as meaning false and all nonzero values as meaning true. For additional information on the use of logical variables in MATLAB, type help logical at the MATLAB prompt.

See Also

mxIsClass, mxSetLogical (Obsolete), logical

mxIsInt32

mxIsNaN