How to calculate Average of n numpy arrays [duplicate]

Question

I have 'n' numpy arrays each with shape (128,) How to get an average numpy array of shape (128,) for the list of numpy arrays. I have seen the documentation of numpy's average() and mean() which describes that the average is calculated for all the elements in a single numpy array rather than multiple or list of numpy arrays. Example

numpyArrayList = [ar1,ar2,ar3,ar4...arn]
avgNumpyArray = avg(numpyArrayList)
avgNumpyArray.shape

should give result as (128,) and this array should contain the average of all the numpy arrays

Thanks in advance

Answer 1

I would use np.mean([ar1,ar2,ar3,ar4...arn], axis=0).

Answer 2

You can achieve this by using the following code

ar = [ar1,ar2,ar3,...,arn]
r = np.mean(ar)

for axis=0 use following

r = np.mean(ar, axis=0)

for axis=1 use following

r = np.mean(ar, axis=1)