In Matlab

Create a function the reads a matrix and flattens it into a vector. The user should have the option to read matrix by rows or by columns. For example: [A B C D E F G H I J K L] by row rightarrow [A B C D E F G H I J K L] or [A B C D E F G H I J K L] by col rightarrow [A B C D E F G H I J K L]