Using the C Math Library

Explicit Memory Management 

In explicit memory management, you must assign the returned mxArray to an array variable before passing it to another function. You use the assignment operator (=) to assign the return value from a library function to an mxArray* variable or by passing an mxArray* variable (uninitialized or initialized to NULL) as an output argument to a library function.

In this memory management scheme:

• You cannot nest calls to library functions. You must declare array variables for all your arrays.
• You must explicitly delete the array you create to avoid memory leaks.

See Example Without Automated Memory Management for an example of explicit memory management.

Automated Versus Explicit Memory Management

Automated Memory Management