Drawing rectangle with border only in matplotlib

Drawing rectangle with border only in matplotlib

To draw a rectangle with only the border (no fill) in Matplotlib, you can use the Rectangle patch object from the matplotlib.patches module. Here's an example of how to draw a border-only rectangle:

import matplotlib.pyplot as plt import matplotlib.patches as patches # Create a figure and axis fig, ax = plt.subplots() # Define rectangle properties x = 1.0 # X-coordinate of the lower-left corner y = 2.0 # Y-coordinate of the lower-left corner width = 3.0 # Width of the rectangle height = 2.0 # Height of the rectangle linewidth = 2 # Border linewidth edgecolor = 'blue' # Border color # Create a Rectangle patch with border-only rect = patches.Rectangle((x, y), width, height, linewidth=linewidth, edgecolor=edgecolor, fill=False) # Add the Rectangle patch to the axis ax.add_patch(rect) # Set the axis limits ax.set_xlim(0, 5) ax.set_ylim(0, 5) # Show the plot plt.show()

In this code:

  1. We create a Matplotlib figure and axis.

  2. We define the properties of the rectangle, such as its coordinates, width, height, linewidth (border width), and edgecolor (border color).

  3. We create a Rectangle patch with the specified properties and set fill=False to ensure that only the border is drawn.

  4. We add the Rectangle patch to the axis using ax.add_patch().

  5. We set the axis limits to ensure the rectangle is visible within the plot.

  6. Finally, we display the plot using plt.show().

Adjust the values of x, y, width, height, linewidth, and edgecolor to customize the appearance of your border-only rectangle as needed.

Examples

  1. "How to draw a rectangle with only border in Matplotlib?"

    Description: This query seeks information on drawing a rectangle with only its border visible, leaving the interior transparent. This can be achieved by using the Rectangle patch in Matplotlib and setting its fill property to False. Below is the Python code demonstrating this:

    import matplotlib.pyplot as plt from matplotlib.patches import Rectangle # Create a figure and axis fig, ax = plt.subplots() # Draw rectangle with only border rect = Rectangle((0.2, 0.2), 0.5, 0.3, fill=False, edgecolor='blue', linewidth=2) ax.add_patch(rect) # Set axis limits and display ax.set_xlim(0, 1) ax.set_ylim(0, 1) plt.axis('equal') plt.show()

  2. "Matplotlib draw rectangle with border but no fill"

    Description: This query is about drawing a rectangle with a border but without filling the interior in Matplotlib. You can achieve this by creating a Rectangle patch with fill=False and specifying the desired border properties. Below is the Python code demonstrating this:

    import matplotlib.pyplot as plt from matplotlib.patches import Rectangle # Create a figure and axis fig, ax = plt.subplots() # Draw rectangle with only border rect = Rectangle((0.2, 0.2), 0.5, 0.3, fill=False, edgecolor='red', linewidth=1.5) ax.add_patch(rect) # Set axis limits and display ax.set_xlim(0, 1) ax.set_ylim(0, 1) plt.axis('equal') plt.show()

  3. "Matplotlib draw hollow rectangle"

    Description: This query is about drawing a hollow or empty rectangle using Matplotlib. To achieve this, you can create a Rectangle patch with the fill parameter set to False, ensuring only the border is drawn. Below is the Python code illustrating this:

    import matplotlib.pyplot as plt from matplotlib.patches import Rectangle # Create a figure and axis fig, ax = plt.subplots() # Draw hollow rectangle rect = Rectangle((0.2, 0.2), 0.5, 0.3, fill=False, edgecolor='green', linewidth=2) ax.add_patch(rect) # Set axis limits and display ax.set_xlim(0, 1) ax.set_ylim(0, 1) plt.axis('equal') plt.show()

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