Pointer to an array. Each element in the array contains the
real component of a value. The array must be in dynamic memory; call mxCalloc to
allocate this memory. Do not use the ANSI® C calloc function,
which can cause memory alignment issues leading to program termination.
mxSetData is like mxSetPr,
except that in C, its second argument is a void *.
Use this function on numeric arrays with contents other than double.
This function does not free any memory allocated for existing
data that it displaces. To free existing memory, call mxFree on
the pointer returned by mxGetData before you
following examples in matlabroot/extern/examples/refbook.