CODEWITHSUNDEEP
pythonarraysnumpypython-2.6
MaxPowers
MaxPowers

Reputation: 5486

How to get the number of elemets in an np.array?

Suppose there is an array 

(1) x=np.array([[1,2],[1,2],[1,2]])

and a second array

(2) y=np.array([[1],[1,2],[1,2,3]])

The command size(x) returns the total count of all elements along every axis. In this case 6. However, size(y) returns 3. This must be because numpy interprets (2) in this case as three elements (the three subarrays) along one axis, although shape(y) returns (3, ). My question is now: how can I get numpy to interpret (2) as an array with three axes, so that size(y) returns the total count of all atomic elemets, which is 6?

Upvotes: 0

Views: 617

Answers (1)

Tim
Tim

Reputation: 1546

I don't think it's possible to get the number of elements from y without looping over the objects.

The problem is that the elements of y are not numbers, they are objects (lists). Numpy does not support lists of lists and therefore it stores it as a 1-dimensional array of objects. I don't think there are Numpy methods to get the total number of elements in y.

Upvotes: 1

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