Python Coding

Problem 7. Define a function, called matrix_sum (M), which takes as input a matrix M (as a NumPy array), and adds up all of the entries. For example, if mat is the matrix we defined directly above, then matrix_sum (mat) should return -5, since all of the entries in mat add up to -5. Hint: You will need to use two nested for loops. Use the code in the function abs_matrix as a template for how to structure your code