Create Live Script

To create a live script in the Live Editor, go to the Home tab and click New Live Script . You also can use the edit function in the Command Window. For example, type edit penny.mlx to open or create the file penny.mlx. To ensure that a live script is created, specify a .mlx extension. If an extension is not specified, MATLAB^® defaults to a file with a .m extension, which supports only plain code.

If you have an existing script (.m), you can open it as a new live script in the Live Editor. Opening a script as a live script creates a copy of the file and leaves the original file untouched. MATLAB converts publishing markup from the original script to formatted content in the new live script.

To open an existing script (.m) as a live script (.mlx) from the Editor, right-click the document tab, and select Open scriptName as Live Script from the context menu. Alternatively, go to the Editor tab, click Save, and select Save As. Then, set the Save as type to MATLAB Live Code Files (*.mlx) and click Save. You must use one of the described conversion methods to convert your script to a live script. Simply renaming the script with a .mlx extension does not work and can corrupt the file.

Add Code

After you create a live script, you can add code and run it. For example, add this code that plots a vector of random data and draws a horizontal line on the plot at the mean.

n = 50;
r = rand(n,1);
plot(r)

m = mean(r);
hold on
plot([0,n],[m,m])
hold off
title('Mean of Random Uniform Data')

Run Code

To run the code, click the vertical striped bar to the left of the code. Alternatively, go to the Live Editor tab and click Run . While your program is running, a status indicator appears at the top left of the Editor window. A gray blinking bar to the left of a line of code indicates the line that MATLAB is evaluating. To navigate to the line MATLAB is evaluating, click the status indicator.

If an error occurs while MATLAB is running your program or if MATLAB detects a significant issue in your code, the status indicator becomes an error icon . To navigate to the error, click the icon. An error icon to the right of the line of code indicates the error. The corresponding error message is displayed as an output.

You do not need to save your live script to run it. When you do save your live script, MATLAB automatically saves it with a .mlx extension. For example, go to the Live Editor tab, click Save , and enter the name plotRand. MATLAB saves the live script as plotRand.mlx.

Display Output

By default, the Live Editor displays output to the right of the code. Each output is displayed with the line that creates it. To change the size of the output display panel, drag the resizer bar between the code and output to the left or to the right.

As you scroll through the code, the Live Editor aligns the output to the code that generates it. To disable the alignment of output to code when output is on the right, right-click the output section and select Disable Synchronous Scrolling.

To clear an output, right-click the output or the code line that created it, and select Clear Output. To clear all output, right-click anywhere in the script and select Clear All Output. Alternatively, go to the View tab and in the Output section, click the Clear all Output button.

To open an individual output such as a variable or figure in a separate window, click the Open in figure window button in the upper-right corner of the output. Variables open in the Variables editor, and figures open in a new figure window. Changes made to variables or figures outside of a live script do not apply to the output displayed in the live script.

To modify figures in the output, use the tools in the upper-right corner of the figure axes or in the Figure toolstrip. You can use the tools to explore the data in a figure and add formatting and annotations. For more information, see Modify Figures in Live Scripts.

Change View

You can optimize the layout of your live script for your current workflow by changing where to display output and whether to display code in the live script. To change the layout of the live script, go to the View tab, and in the View section, select from the available options. You also can select one of the layout buttons at the top right of the live script.

To change the default location of the output when creating a new live script, on the Home tab, in the Environment section, click Preferences. Select MATLAB > Editor/Debugger > Display, and then select a different option for the Live Editor default view.

Format Text

You can add formatted text, images, hyperlinks, and equations to your live scripts to create a presentable document to share with others. For example, add a title and some introductory text to plotRand.mlx:

For more information, including a list of all available formatting options, see Format Text in the Live Editor.

Zoom

To adjust the displayed font size in the Live Editor by zooming in and out, use the Ctrl+Plus (+) and Ctrl+Minus (-) keyboard shortcuts or the Ctrl+Mouse Scroll keyboard shortcut. On macOS systems, use the Command key instead of the Ctrl key.

The change in the displayed font size is not honored when exporting the live script to PDF, Microsoft^® Word, HTML, LaTeX, Markdown, or Jupyter^® notebooks.