Star pattern plot using python

 

import matplotlib.pyplot as plt

import numpy as np

rows,cols=5,5

x=np.arange(cols)

y=np.arange(rows)

X,Y=np.meshgrid(x,y)

X=X.flatten()

Y=Y.flatten()

fig,ax=plt.subplots(figsize=(6,6))

ax.scatter(X,Y,marker='*',s=300,color='gold',edgecolor='black')

ax.set_xlim(-1,cols)

ax.set_ylim(-1,rows)

ax.set_xticks([])

ax.set_yticks([])

ax.set_frame_on(False)

plt.show()

#source code --> clcoding.com 

Code Explanation:

Step 1: Import Required Libraries

import matplotlib.pyplot as plt

import numpy as np

matplotlib.pyplot (plt): Used for creating plots and visualizations.

numpy (np): Used for numerical operations, like generating coordinate grids.

Step 2: Define the Grid Size

rows, cols = 5, 5  

Sets the number of rows and columns in the star pattern.

The grid will have 5 rows and 5 columns, making a 5x5 arrangement.

Step 3: Create X and Y Coordinates

x = np.arange(cols)  # Creates an array [0, 1, 2, 3, 4] for x-coordinates

y = np.arange(rows)  # Creates an array [0, 1, 2, 3, 4] for y-coordinates

X, Y = np.meshgrid(x, y)

np.arange(cols): Generates an array [0, 1, 2, 3, 4] for the x-coordinates.

np.arange(rows): Generates an array [0, 1, 2, 3, 4] for the y-coordinates.

np.meshgrid(x, y): Creates a grid of (X, Y) coordinate pairs where each star will be placed.

Step 4: Convert 2D Arrays to 1D Lists

X = X.flatten()

Y = Y.flatten()

Converts X and Y from 2D arrays into 1D arrays.

This is needed because scatter() requires 1D lists of x and y coordinates.

Step 5: Create a Figure and Axis

fig, ax = plt.subplots(figsize=(6, 6))

Creates a figure (fig) and axis (ax) for the plot.

figsize=(6,6) sets the plot size to 6x6 inches.

Step 6: Plot Stars using scatter()

ax.scatter(X, Y, marker='*', s=300, color='gold', edgecolors='black')

scatter(X, Y, marker='*'): Plots stars (*) at each (X, Y) coordinate.

s=300: Controls the size of each star.

color='gold': Makes the stars golden.

edgecolors='black': Adds black outlines around the stars.

Step 7: Adjust Axis Limits

ax.set_xlim(-1, cols)  # Limits the x-axis from -1 to 5 (adds padding)

ax.set_ylim(-1, rows)  # Limits the y-axis from -1 to 5 (adds padding)

Sets x-axis from -1 to cols (5) to provide a little spacing.

Sets y-axis from -1 to rows (5) to prevent crowding.

Step 8: Remove Unnecessary Axes Information

ax.set_xticks([])  # Removes x-axis tick marks

ax.set_yticks([])  # Removes y-axis tick marks

ax.set_frame_on(False)  # Hides the axis border

Removes tick marks (set_xticks([]), set_yticks([])) to make the grid cleaner.

Hides the border (set_frame_on(False)) to focus only on the stars.

Step 9: Display the Plot

plt.show()

Displays the star pattern on the screen.