Hello Reid,
According to my understanding, you are getting an error due to a reference to a function that the linker couldn't resolve.
You can try passing the libraries using the -l and -L flags.
Example:-
mex '-LC:\Program Files\MATLAB\R2014a\extern\lib\win64\microsoft' ...
-llibmwlapack matrixDivide.c
To read more about Mex Functions, please refer to the following documentation: - https://www.mathworks.com/help/matlab/ref/mex.html
