Numpy matrix.cumsum () method, we can find the
cumulative sum of a given matrix and output it as a one-dimensional matrix. p>
Return: Return cumulative sum of matrix
Example # 1:
In this example, we see that using the
matrix.cumsum ( ) we can find the cumulative sum of the given array.
[[6 8 11]]
Example # 2:
[[1 3 6 10 15 21]]
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