Checkboard pattern plot using python

 

import numpy as np

import matplotlib.pyplot as plt

def plot_checkboard(size=8):

    board=np.indices((size,size)).sum(axis=0)%2

    

    plt.figure(figsize=(6,6))

    plt.imshow(board,cmap="gray",interpolation="nearest")

    

    plt.xticks([])

    plt.yticks([])

    plt.title('checkboard pattern plot')

    plt.show()

plot_checkboard(8)   

#source code --> clcoding.com 

Code Explanation:

Importing Required Libraries

import numpy as np

import matplotlib.pyplot as plt

numpy is used to generate the checkerboard pattern as a 2D array.

matplotlib.pyplot is used to plot the pattern.

Function Definition

def plot_checkerboard(size=8):

This function creates and plots a checkerboard of size × size squares.

The default board size is 8 × 8, like a chessboard.

Creating the Checkerboard Pattern

board = np.indices((size, size)).sum(axis=0) % 2

How This Works:

np.indices((size, size)) creates two 2D arrays of indices:

row_indices, col_indices = np.indices((8, 8))

Applying % 2:

If (row + col) % 2 == 0, it’s black (0).

If (row + col) % 2 == 1, it’s white (1).

Final Checkerboard (8×8) Array:

[[0 1 0 1 0 1 0 1]

 [1 0 1 0 1 0 1 0]

 [0 1 0 1 0 1 0 1]

 [1 0 1 0 1 0 1 0]

 [0 1 0 1 0 1 0 1]

 [1 0 1 0 1 0 1 0]

 [0 1 0 1 0 1 0 1]

 [1 0 1 0 1 0 1 0]]

This alternating 0s and 1s forms a checkerboard pattern.

Plotting the Checkerboard

plt.figure(figsize=(6, 6))

plt.imshow(board, cmap="gray", interpolation="nearest")

plt.figure(figsize=(6,6)) → Sets the figure size.

plt.imshow(board, cmap="gray", interpolation="nearest")

board: The checkerboard array.

cmap="gray": Uses grayscale colors (0 = black, 1 = white).

interpolation="nearest": Ensures sharp edges between squares.

Formatting for a Clean Look

plt.xticks([])

plt.yticks([])

plt.title("Checkerboard Pattern", fontsize=14, fontweight='bold')

plt.xticks([]), plt.yticks([]): Removes axis labels for a clean look.

plt.title(...): Adds a title to the plot.

Displaying the Plot

plt.show()

Displays the checkerboard plot.

When calling:

plot_checkerboard(8)

You get a black and white checkerboard with an 8×8 grid.