Array notation in numpy

Question

In Numpy,

What is the difference between

import numpy as np
arry = np.array([1,2,3])

and

import numpy as np
arry = np.array([[1,2,3]])

you have an extra dimension defined in the second one. First one is a 1d array, second one is 2d. Verify with arry.shape — karakfa
– karakfa, Commented Feb 19, 2021 at 16:00

Nurislom Rakhmatullaev · Accepted Answer · 2021-02-19 16:02:00Z

2

First one is 1D array. Second one is 2d array.
Fist one doesn't have a columns. So you can pick an element by

arry[0]

But the second one you should pick a column, like

arry[0, 0]

For 2D and higher:

arry[row_number, column_number]

answered Feb 19, 2021 at 16:02

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