append to numpy array code example

Example 1: append element to an array python

x = ['Red', 'Blue']
x.append('Yellow')

Example 2: python append to 2d array

temp_list = [[], [], [], []]
temp_list[0].append("a1")
temp_list[1].append("a2")
temp_list[2].append("a3")
temp_list[3].append("a4")

Example 3: numpy append number to array

import numpy as np
a = np.array([1, 2, 3])
newArray = np.append(a, [10, 11, 12])

Example 4: append value to numpy array

x = np.random.randint(2, size=10)
x = np.append(x, 2)

Example 5: how to append two numpy arrays

#concatenating through column(axis = 1)
numpy.concatenate((N,M),1)

Example 6: np append row

A= [[1, 2, 3], [4, 5, 6]]
np.append(A, [[7, 8, 9]], axis=0)

    >> array([[1, 2, 3],
              [4, 5, 6],
              [7, 8, 9]])
#or 
np.r_[A,[[7,8,9]]]