% The Command-Window text should be modified on the EDTĪwtinvoke(jTextArea,'replaceRange( II)'. Try jTextArea = jTextArea.java catch, end %#ok % Note: catch a possible trailing newline % Does the displayed text end with the default prompt? newPrompt (end- 2: end ), newLen- 3, newLen ) If ~isempty (pos ) % Short prompts need to be space-paddedĮnd % The Command-Window text should be modified on the EDTĪwtinvoke (jTextArea, 'replaceRange( II)'. Pos = strfind (cwText ( max ( 1,end- 3 ): end ), '> ' ) % Does the displayed text end with the default prompt? % Note: catch a possible trailing newline try jTextArea = jTextArea. If nargin & ~isempty(newPrompt) & ~strcmp(newPrompt,'> that we have the Command-Window object callback set, we need to set the logic of prompt replacement – this is done in the internal Matlab function setPromptFcn. JTextArea = cmdWin.getComponent(0).getViewport.getComponent(0) JDesktop = .MLDesktop.getInstance ĬmdWin = jDesktop.getClient('Command Window') getFocusOwner Įnd % Instrument the text area's callback if nargin & ~isempty (newPrompt ) & ~ strcmp (newPrompt, '> ' ) set (jTextArea, 'CaretUpdateCallback', } ) Įlse set (jTextArea, 'CaretUpdateCallback', ) % Get the reference handle to the Command Window text area This callback is fired whenever the desktop text is modified, which is an event we trap to replace the displayed prompt: The solution involved finding the Command-Window reference handle, and setting one of its many callbacks, in our case CaretUpdateCallback. I decided to use the callback method to set the prompt – interested readers can try the PostSet method. The first of these methods is a well-known Matlab practice, although we shall see that it uses an undocumented callback and functionality the PostSet method is entirely undocumented and not well-known and shall be described in some later article. There are two methods of handling multiple asynchronous events in Matlab: setting a callback on the object, and setting a PostSet handle.listener (or schema.listener) on the relevant object property. But this case is different since cprintf runs once synchronously (user-invoked), whereas the prompt appears asynchronously multiple times. ![]() So the prompt can (probably) not be modified in advance, but what if it could be modified after being displayed? It is true that my cprintf utility modifies the Command-Window contents in order to display formatted text in a variety of font colors. At first thought this cannot be done: The Command-Window prompts are hard-coded and to the best of my knowledge cannot be modified via properties or system preferences. A modified version of this example exists on your system.A few days ago, a reader emailed me with a challenge to modify the standard matlab Command-Window prompt from “> ” to some other string, preferably a dynamic prompt with the current timestamp. Generate C and C++ code using MATLAB® Coder™. For example, implement the do…while loop above by using a MATLAB while loop. To mimic the behavior of a do…while loop, set the initial condition of while to true and place the conditional expression inside the loop. How to mimic the behavior of a DO…WHILE LOOP? do % Not valid MATLAB syntax statements while expression However, while evaluates the conditional expression at the beginning of the loop rather than the end. The MATLAB while loop is similar to a do…while loop in other programming languages, such as C and C++. The MATLAB while loop is similar to a do…while loop in other programming languages, What’s the difference between while and while in MATLAB? When nesting a number of while statements, each while statement requires an end keyword. To skip the rest of the instructions in the loop and begin the next iteration, use a continue statement. To programmatically exit the loop, use a break statement. If you inadvertently create an infinite loop (that is, a loop that never ends on its own), stop execution of the loop by pressing Ctrl+C. Therefore, MATLAB does not need to evaluate the second part of the expression, which would result in an undefined function error. While organizing your code: How to stop execution of an infinite loop in MATLAB? Be aware of background processes that share computational resources and decrease the performance of your MATLAB ® code. To speed up the performance of your code, consider these techniques. How to speed up the performance of MATLAB? This practice can decrease first-time run costs. To avoid large files and files with infrequently accessed code, split your code into simple and cohesive functions. ![]() How to reduce first time run costs in MATLAB?
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