NumPy tile() Function in Python

NumPy tile() function in Python is used to construct an array by repeating a given input array by specified number of times given by the reps parameter. The NumPy np.tile() function takes an array as an input and creates a new array by repeating the input array.

In this article, I will explain how to use the NumPy tile() function and using it how to repeat a given array in different ways with examples.

1. Quick Examples of Python NumPy tile() Function

If you are in a hurry, below are some quick examples of how to use NumPy tile() function in Python.


# Below are the quick examples

# Example 1: Use tile() function on numpy 1-d array
arr2 = np.tile(arr, 2)

# Example 2: Using tupe for reps param
repetitions = (2, 1)
arr2 = np.tile(arr, repetitions)

# Example 3: Use numpy.tile() function to vertically
repetitions = (2,1)
arr2 = np.tile(arr, repetitions)

# Example 4: Use numpy.tile() function to horizontally
repetitions = (3,2)
arr2 = np.tile(arr, repetitions)

# Example 5:  Use numpy.tile() function with two-dimenstional array
repetitions = (3,2)
arr2 = np.tile(arr, repetitions)

# Example 6: Use multi-dimensional arrays
arr2 = np.tile(arr, (2, 3))

2. Syntax of NumPy tile()

Following is the syntax of the numpy.tile() function.


# Syntax of numpy.tile() 
numpy.tile(arr, reps)

2.1 Parameters of tile()

Following is the parameters of tile().

  • arr: This parameter represents the input array.
  • reps: The number of repetitions of arr along each axis.

2.2 Return value of tile()

This function returns the tiled output array.

3. Usage numpy.tile() Function

Numpy tile() function returns a new array, which contains a repeated input array in simple words it generates a new array from the original array along with specified repetitions.

You can repeat the given array using np.tile() function along with specified repetitions (number of times to repeat). Let’s create a an array using numpy.array() function. Subsequently, we used the numpy.tile() function to multiply the array. 


import numpy as np
arr = np.array([2, 5, 8])

# Use tile() function to 1-d array
arr2 = np.tile(arr, reps=2)
print(arr2)

# Output:
# [2 5 8 2 5 8]

5. Use tile() Function To Vertically

To repeat the array multiple times vertically use the reps with tuple (2,1), this repeats the same NumPy array into vertically.


# Use numpy.tile() function to vertically
repetitions = (2,1)
arr2 = np.tile(arr, repetitions)
print(arr2)

# Output:
# [[2 5 8]
# [2 5 8]]

6. Use tile() Function To Horizontally

We can also add the horizontal repetitions using np.tile() function. Use tuple (3,3) which repeats elements both horizontally and vertically.


# Use numpy.tile() function to horizontally
repetitions = (3,2)
arr2 = np.tile(arr, repetitions)
print(arr2)

# OutPut:
# [[2 5 8 2 5 8]
#  [2 5 8 2 5 8]
#  [2 5 8 2 5 8]]

7. Use NumPy tile() Function to Two-Dimensional Array

Let’s use a two-dimensional array and apply numpy.tile() function which will get repetitions of given array along with specified repetitions. 


import numpy as np
arr = np.array([[2, 5, 8],[0, 4, 7]])

# Use numpy.tile() function to two-dimenstional array
repetitions = (3,2)
arr2 = np.tile(arr, repetitions)
print(arr2)

# OutPut:
# [[2 5 8 2 5 8]
# [0 4 7 0 4 7]
# [2 5 8 2 5 8]
# [0 4 7 0 4 7]
# [2 5 8 2 5 8]
# [0 4 7 0 4 7]]

# Use tile() function
arr2 = np.tile(arr, 2)
print(arr2)

# Output:
# [[2 5 8 2 5 8]
# [0 4 7 0 4 7]]

8. Conclusion

In this article, I have explained how to use numpy.tile() function in Python and using this how to return tiled output array on 1-D and 2-D arrays.

Happy Learning!!

References

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Vijetha

With 5 of experience in technical writing, I have had the privilege to work with a diverse range of technologies like Python, Pandas, NumPy and R. During this time, I have consistently demonstrated my ability to grasp intricate technical details and transform them into comprehensible materials.

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