Create an array with the maximum of a list of arrays

Question

I've 24 arrays in a list and I'd like to crate an array with the maximum of each index.

In other words, I've something like this

list_value = [array([1,2,3]), array([4,5,6]), array([7,8,9]), array([1,5,8]), array([9,4,3])]

In my case, each array has 280000 values.

And I would like create an array like this:

max_value = [array([max(4,4,7,1,9),max(2,5,8,5,4),max(3,6,9,8,3)])]

So I want to finally obtain:

max_value = [9,8,9]
type(max_value) = <type 'numpy.ndarray'>

Ashwini Chaudhary · Accepted Answer · 2015-02-25 14:38:06Z

3

Convert list_value to a NumPy array and then apply numpy.ndarray.max on 0th axis:

>>> arr = np.array(list_value)
>>> arr.max(axis=0)
array([9, 8, 9])

answered Feb 25, 2015 at 14:38

Ashwini Chaudhary

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