To open theĬommand History window and display a specific statement, type any part of the statementĪt the prompt and then press the Up Arrow key. Press the Up Arrow key (↑) or enter commandhistory. To open the Command History window with all history showing, in the Command Window, You can select entries in the Command History window, and then perform these actions MATLAB automatically deletes the oldest entries. Specified in the Command History preferences. Number of statements in the history file exceeds the number of statements to save, as All entries remain until you delete them, or until the For example, changes to values in the Variables editor are not included History file does not include every action taken in MATLAB. By default, MATLAB automatically saves the command history file after each statement. The Editor, Command History window, and Help browser. These statements include those you run using theĮvaluate Selection item on context menus in tools such as MATLAB saves statements that run in the Command Window to the history file Brackets in the left margin indicate statements that were processed as a group.Ī colored mark precedes each statement that generated an error. The short date format for your operating system, followed by the statements from that The Command History lists the time and date of each session in Here we discuss how to provide comments in MATLAB along with the examples and outputs.The Command History window displays a log of statements that you ran in theĬurrent and previous MATLAB ® sessions. Doing this prevents any run time errors from being thrown by the compiler as it does not understand human-friendly languages.Comments are used in MATLAB to provide narrative lines for the code and prevent them from getting executed.This is achieved by pressing together “Ctrl” & “R” on our keyboard ![]() Output 1 (After commenting on the narrative lines):Īs we can see in the output, the narrative lines are now commented. For this example, we will use the same code as in the above example. For this, a combination of “Ctrl” plus “R” is used. In the third example, we will be using our keyboard’s shortcut keys to comment on our narrative lines. In this example, we have used the “%” key present on our keyboard. ![]() “comment” these narrative lines, to avoid any error. Therefore, we must use these lines as comments, i.e. If we try to execute our code directly, we will get a run time error in lines to lines 3 & 4 as these lines are not understandable by MATLAB’s compiler. Prefix “%” at the end of the narrative lines.Our purpose is to prevent these narrative lines from getting executed by the compiler. In this example also we will be writing a dummy code with some narrative explaining the code. In the second example, we will be using our keyboard’s “%” key to comment on our narrative lines. In this example, we have used the “Comment” button present in the Live Editor for this purpose. Output 1 (After commenting on the narration lines): This is how our input and output will look like in MATLAB: ![]() Click the “Comment” button (labeled as “%” sign) present in MATLAB’s “Live Editor” tab, as shown in the image below.Select the narrative lines which we want to comment (the lines written to explain the code).Write the code along with the narration to describe it.Our purpose is to prevent our narration lines from getting executed by the compiler, for which we will “comment” the narration lines. But, first, let us write a dummy code and provide a narration that will explain our code. In the first example, we will make use of MATLAB’s “Comment” button present in the Live Editor. Let us now understand how to provide comments in MATLAB. Utilizing the “Ctrl + R” short cut keys.Utilizing the ‘%’ sign present in our keyboard.Utilizing the “Comment” button present in the MATLAB Editor (Labelled as “%”).
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