Using the C Math Library

Deleting Bound Arrays 

You must explicitly delete:

• Any array that you've bound to a variable by calling mlfAssign()
• Any array that you've passed as an output argument to a function

mxDestroyArray() destroys the array (mxArray*) passed to it. For example,

mxDestroyArray(A);

destroys array A.

mxDestroyArray() does handle a NULL argument. However, mxDestroyArray() does not reinitialize the mxArray* pointer passed to it to NULL. If you assign an array to an mxArray* variable and subsequently delete that array by calling mxDestroyArray(), then you must reinitialize the mxArray* variable to NULL before reassigning another array to that variable. If you follow the Automated Memory Management, then you avoid this awkward coding.

mlfAssign(&c, mlfScalar(5));
mxDestroyArray(c);
c = NULL;
mlfAssign(&c, mlfScalar(6));

Assigning Arrays to mxArray* Variables

Restoring the Previous Context