# Step-by-Step Guide to Plot Two Curves on the Same Graph in MATLAB

Are you trying to plot two curves on the same graph using MATLAB, but don't know how to do it? You've come to the right place! We'll explain the different steps involved and how to get there, as well as provide some useful resources to help you along the way.

### Prerequisites

Before you can plot two curves on the same graph in MATLAB, there are some prerequisites you will need to have in place. First, you will need to have a basic understanding of the MATLAB programming language, including syntax, variables, and how to plot data. Secondly, you'll need to have MATLAB installed on your machine, ready to be used.

### Step 1: Create a Simple Graph First

The first step to plotting two curves on the same graph in MATLAB is to create a simple graph. To do this, open the MATLAB application and create a new script. Then, create a function that returns a graph. An example of a function that produces a simple graph is shown below:

``````function graph = DrawGraph()
% Create an array of x coordinates
x = linspace(-10, 10, 2000);

% Calculate the y coordinates from the x coordinates
y = sin(x);

% Plot the graph
plot(x, y, 'b');

% Label the graph
xlabel('x');
ylabel('y');

% Return the graph
graph = gcf;
end
``````

This code creates a graph with x and y coordinates calculated from the sin() function and plots it.

### Step 2: Plot Two Curves in the Same Graph

Once you have a simple graph, you can plot two curves on it. To do this, we are going to create two separate functions, each of which returns a graph object. Then we can add these graphs to the same plot. An example of such a function is shown below:

``````function graph = DrawCurve()
% Create an array of x coordinates
x = linspace(-10, 10, 2000);

% Calculate the y coordinates from the x coordinates
y = sin(x)+cos(x);

% Plot the graph
graph = plot(x, y, 'b');
end
``````

Once we are done creating the two functions, we can then plot both simultaneously in the same graph. This can be done using the MATLAB command `hold on`, which preserves the graph's current state when plotting the next one.

### Step 3: Plot Both Curves in the Same Graph

Now that we have the two functions written, we can plot both curves in the same graph. To do this, we first use the `hold on` command and then call the two functions.

``````hold on;
graph1 = DrawGraph();
graph2 = DrawCurve();
``````

This will produce a graph with both curves plotted on the same graph.

### Step 4: Customize the Graph

Once both curves have been plotted in the same graph, you can customize the graph to suit your needs. This can be done by changing the labels, axis, title, grid, etc.

### Step 5: Save the Graph

Finally, you can save the graph to an image file by using the MATLAB command `saveas()`. This will save the graph to an image file with the extension of your choice.

## FAQ

### What is MATLAB?

MATLAB (Matrix Laboratory) is a language and platform for technical computing, visualizing, and numerical computation. It enables users to perform calculations, create algorithms, analyze data, and visualize results.

### What is h3 tag?

An h3 tag is an HTML tag that stands for "headline 3" and is used in HTML documents to create headlines. It is one level higher in importance than an h4 tag and two levels lower than an h1 tag.

### How do I plot two curves in the same graph?

First, you will need to have a basic understanding of the MATLAB programming language, including syntax, variables, and how to plot data. Then you will need to create separate functions for each of the curves and plot them simultaneously in the same graph using the command “hold on”. Lastly, you can customize the graph to suit your needs and save the graph to an image file.

### What is the command to save a graph in MATLAB?

To save a graph in MATLAB, use the `saveas()` command. This will save the graph to an image file with the extension of your choice.

### What is a syntax in MATLAB?

A syntax in MATLAB is a sequence of characters that represent commands and functions. Syntax specifies the order of words, the rules for constructing phrases, and the rules for joining words together.

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