Numpy.put() method is “used to replace specific elements of an array with given values of p_array.” Array indexed works on a flattened array.
Syntax
numpy.put(array, indices, values, mode)Parameters
The NumPy put() function can take up to 4 parameters.
- array: It is the array in which we want to work
- indices: Index of the values to be replaced. When the function is called, it flattens and works on the array.
- values: It’s an array that contains the values to be inserted in the array.
- mode: This is an optional field. We have 3 types of modes:
-
- raise: This is the default mode that raises an error.
- warp: It warps around the array.
- clip: It clips to the range of the array.
Return Value
The put() function returns a modified array after replacing the values.
Example 1: How to Use np.put() Method
# Importing numpy
import numpy as np
# We will create an 1D array
arr = np.array([47, 20, 41, 63, 21, 4, 74])
# Printing the array
print("The array is: ", arr)
# Shape of the array
print("Shape of the array is : ", np.shape(arr))
# Now we will replace array elements at position 2 and 3
np.put(arr, [2, 3], [100, 1000])
# Printing new array
print("New array is: ", arr)Output
The array is: [47 20 41 63 21 4 74]
Shape of the array is : (7,)
New array is: [47 20 100 1000 21 4 74]Example 2: Replace array elements at position 2 and 3
# Importing numpy
import numpy as np
# We will create an 1D array
arr = np.array([47, 20, 41, 63, 21, 4, 74])
# Printing the array
print("The array is: ", arr)
# Shape of the array
print("Shape of the array is : ", np.shape(arr))
# Now we will replace array elements at position 2 and 3
np.put(arr, [2, 100], [90, 540], mode='warp')
# Printing new array
print("New array is: ", arr)Output
The array is: [47 20 41 63 21 4 74]
Shape of the array is : (7,)
New array is: [ 47 20 540 63 21 4 74]That’s it.
Ankit Lathiya is a Master of Computer Application by education and Android and Laravel Developer by profession and one of the authors of this blog. He is also expert in JavaScript and Python development.
