How to sum all the arrays inside a list of arrays?

confusion-matrix, multidimensional-array, numpy, python-3.x

Solution

Just `sum` the list:

>>> sum([np.array([[5,0,0],[0,5,0],[0,0,5]]), np.array([[1,1,0],[2,4,0],[2,0,5]])])
array([[ 6,  1,  0],
       [ 2,  9,  0],
       [ 2,  0, 10]])

Problem

I am working with the confusion matrix. So for each loop I have an array (confusion matrix). As I am doing 10 loops, I end up with 10 arrays. I want to sum all of them. So I decided that for each loop I am going to store the arrays inside a list --I do not know whether it is better to store them inside an array. And now I want to add each array which is inside the list. So If I have: ``` 5 0 0 1 1 0 0 5 0 2 4 0 0 0 5 2 0 5 ``` The sum will be: ``` 6 1 0 2 9 0 2 0 10 ``` This is a picture of my confusion matrices and my list of arrays: This is my code: ``` list_cm.sum(axis=0) ```

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