# Learn the Process of Plotting a Square Using the Graphing Tools in MATLAB

This article aims to provide a thorough guide on plotting a square using the popular programming language, MATLAB. We will break down the steps involved in the process and demonstrate its usage by off …

Updated November 13, 2023

*Hey! If you love Computer Vision and OpenCV as much as I do let's connect on Twitter or LinkedIn. I talk about this stuff all the time and build cool projects.*This article aims to provide a thorough guide on plotting a square using the popular programming language, MATLAB. We will break down the steps involved in the process and demonstrate its usage by offering code snippets for better understanding. With its versatility in handling mathematical equations and graphics, MATLAB is an excellent choice for creating various plots, including squares.

Introduction A square represents a simple geometric shape which consists of four equal sides with right angles at each corner. In mathematics, there are several ways to represent this basic figure, such as through equations and graphs. MATLAB provides multiple graphical tools to help visualize mathematical concepts like squares. This tutorial will walk you through the process of plotting a square in MATLAB while explaining its significance.

Understanding MATLAB’s Graphing Tools
Before diving into how to plot a square, it is essential to understand some fundamental graphical tools used in MATLAB. These tools are typically functions that allow users to create and manipulate 2D or 3D graphs based on input data. Some common graphing functions include `plot`

, `plot3`

, `stairs`

, `stem`

, `surf`

, `fill`

etc. Each of these provides a unique visualization method, depending on the type of graph required by the user’s analysis.

Plotting a Square in MATLAB: Step-by-Step Guide
Now that we have some background on MATLAB’s graphing tools, let us proceed to create a square graph step by step. We will be using the `plot`

function for our square representation since it is best suited for plotting geometric shapes with connected line segments. In this example, we’ll construct a square of side length 2 units.

Step 1: Determine the Coordinates of the Square Corners The first step is to find out the coordinates of the four corners of our desired square. To do so, we need to calculate and specify these points in a Cartesian coordinate system where x and y-axis intersect at the origin (0, 0).

For a square with side length equal to 2 units: Top Left Corner: (-2, 2) Top Right Corner: (-2, -2) Bottom Right Corner: (2, -2) Bottom Left Corner: (2, 2)

Step 2: Create a Vector of Coordinate Points
We need to store the coordinates of each corner in an array or matrix so that MATLAB can plot these points. In this case, we will create a vector called `square_points`

that includes all four corners as follows:

square_points = [ -2 2; -2 -2; 2 -2; 2 2 ]

Step 3: Use the MATLAB plot Function to Plot the Square
Now that we have our square’s coordinates stored in a vector, we can use the `plot`

function to create the graph. For this purpose, you should pass the vector of points (`square_points`

) as an input argument to the `plot`

function. Additionally, we also set the linewidth and marker color for better visualization.

plot(square_points, ‘LineWidth’, 2, ‘MarkerSize’, 5, ‘color’, ‘red’)

The above command will plot a square in red with a line width of 2, and each corner marked by a filled circle with radius equal to 5.

Example Code Snippet: % Create a matrix of the square coordinates side_length = 2; % Square side length corners = [ -side_length : side_length ; -side_length : -side_length ; side_length : -side_length ; side_length : side_length ] square_points = [ corners(:,1), corners(:,2) ]'

% Plot the square using the MATLAB plot function plot(square_points, ‘LineWidth’, 2, ‘MarkerSize’, 5, ‘color’, ‘red’)

Conclusion With this tutorial, we have successfully demonstrated how to visualize a square in MATLAB by leveraging its powerful graphical tools. This approach can be applied to plot various other geometric shapes or mathematical graphs using different graphing functions. Mastering these techniques can greatly improve your MATLAB skills and enhance your data analysis capabilities.