Create array of array in numpy

Asked May 27 '20 at 14:30

Active May 27 '20 at 14:30

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I am trying to create an empty array of arrays in numpy, and add elements to it an a for loop.

I tried to create it by arr_of_arrs = np.empty(num_of_arrays, dtype=np.array), but I got an error TypeError: data type not understood.

How can I do it?

asked May 27 '20 at 14:30

Dani

`np.empty(num_of_arrays, dtype='object')`? – Quang Hoang May 27 '20 at 14:31
Do your arrays have a fixed type and fixed shape? – Mateen Ulhaq May 27 '20 at 14:33
@MateenUlhaq Yes. They are all arrays of numbers, and have the same length – Dani May 27 '20 at 14:34
`np.empty((num_of_arrays, len_of_array), dtype=np.float64)`. – Mateen Ulhaq May 27 '20 at 14:36
But you could also just concatenate them all in one go: `np.array(arrays)`. – Mateen Ulhaq May 27 '20 at 14:37

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