adding elements to a numpy array and reshape it

Question

I have the following numpy array

a= np.array([1,1])

I have the two elements

b= [2, 2]
c= [3, 3]

I would like to add those elements b and c, so that my output seems like this

a= [[1, 1],
    [2, 2].
    [3, 3]], #shape=(3,2)

which numpy function should i use? thanks

Sruthi · Accepted Answer · 2022-03-05 21:13:58Z

1

Create a new numpy array with the three elements

>>> np.array([a,b,c])
array([[1, 1],
   [2, 2],
   [3, 3]])
# shape : (3, 2)

If a had more than 1 dimension, np.append can be used :

>>> a= np.array([[1,1], [4,4]])
>>> a
array([[1, 1],
       [4, 4]])
>>> np.append(a,[b],axis=0)
array([[1, 1],
       [4, 4],
       [2, 2]])

edited Mar 5, 2022 at 21:13

answered Mar 5, 2022 at 20:56

Sruthi

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2 Comments

ABA Over a year ago

yes this worked fine thanks, but havin two elements in the a array (a= np.array([[1,1], [4,4]])) makes it impossible to add the elements b and c with this solution. do u have suggestions to solve it ?thnx

Sruthi Over a year ago

@ABA added an edit with this

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