## The Ultimate Guide to NumPy Cumsum in Python

Definition np.cumsum(x): The function computes the cumulative sum of a NumPy array. For an array x with elements [a b c d] the cumulative sum is [a a+b a+b+c a+b+c+d]. Formally, each array element with index i is the sum of all elements with index j<i. numpy.cumsum(a, axis=None, dtype=None, out=None) Arguments: a — Array-like data …