How to Clear the Command Window in Matlab - A Comprehensive Guide for Python Engineers and Computer Vision Experts

In this article, you will learn various techniques on how to clear the command window in Matlab. We will also provide insights into its importance and usage. For Python engineers who possess expertise …

Updated November 26, 2023

Hey! If you love Computer Vision and AI, let's connect on Twitter or LinkedIn. I talk about this stuff all the time!

In this article, you will learn various techniques on how to clear the command window in Matlab. We will also provide insights into its importance and usage. For Python engineers who possess expertise in Matlab and Computer Vision, understanding these methods can help you effectively troubleshoot issues while working within a MATLAB environment.


Matlab is an advanced programming language designed for numerical computations, graphics representation, and algorithm development. It’s widely used by engineers, scientists, and researchers from various domains to process large datasets and visualize their findings. Despite its vast functionalities, users may encounter instances where they need to clear the command window or reset it for troubleshooting purposes. In this article, we will discuss three primary methods to clear the MATLAB Command Window:

  1. Clear the current line
  2. Clear the entire command history
  3. Close and reopen a new MATLAB session

Method 1: Clearing the Current Line in Matlab

The first method for clearing the command window involves erasing only the current line displayed in the Command Window. This might be useful when you are working on a large script or dealing with complex expressions, and you want to focus on one particular task while maintaining the previous commands' results. To execute this process, follow these steps:

  1. Navigate to your MATLAB environment and locate the command window, which typically resides at the bottom of the screen when working in a new session.
  2. Type “clc” and press “Enter.” The text editor will remove everything on the current line, effectively erasing it. Note that this operation doesn’t affect any previously executed commands or variables. If you want to delete both the current line and the previous one, use the “clear” command instead of “clc.”
  3. You may repeat this process as needed while working in the MATLAB environment. Remember, this approach only clears the current line and does not impact other parts of your work.

Method 2: Clearing the Entire Command History

The second method involves clearing the entire command history in Matlab’s Command Window. This can be useful when you need to start with a clean slate or are troubleshooting specific errors within your code. To do this, follow these steps:

  1. Navigate to the MATLAB Command Window as explained previously.
  2. Type “clear commands” and press “Enter.” This will erase all previously executed commands and variables from the command history, effectively resetting the environment. Note that it won’t delete any data in your workspace or variables stored within the workspace.
  3. You may also use the “clc” shortcut for this purpose by typing “clear commands -r,” which is equivalent to executing “clear commands.” The “-r” argument ensures all the command history items are removed, leaving only those remaining in the workspace.

This method provides a clean slate for your work, allowing you to restart without being influenced by previous actions or errors encountered. However, note that this does not remove any changes made to variables within your workspace.

Method 3: Closing and Reopening a New MATLAB Session

The third method involves closing the current Matlab session and starting a new one. This may be necessary if you want to ensure a fresh environment without any interference from previous actions or errors. To use this approach, follow these steps:

  1. Save any open files that need to be retained by exiting MATLAB gracefully using the “Save All” option in the File menu, which will store your workspace variables and other data for later use.
  2. Quit Matlab as usual through the application’s menus or using a keyboard shortcut such as “Ctrl + Q.” This will close the current session, removing all variables and command history from your computer memory.
  3. Launch a new instance of MATLAB to open a clean environment without any pre-existing data or errors. Start working on your tasks or scripts in this fresh environment as needed.
  4. If you need access to saved files from the previous session, reopen them within the new Matlab session by using the “Open” option in the File menu. This will load your workspace and variables into the new MATLAB instance, allowing you to continue working with a clean environment alongside previously stored data.


In summary, clearing the command window in Matlab is an essential skill for engineers, scientists, and researchers who work extensively within the MATLAB environment. This article discussed three different methods to clear the command window: clearing the current line using “clc,” erasing the entire command history with “clear commands” or “clear commands -r,” and closing the session and opening a new one for a fresh start. By mastering these techniques, you can better navigate and manage the MATLAB environment as a Python engineer or Computer Vision expert, making your workflow more efficient and seamless.