MATLAB: Prompt line blocks access to figure

pauseplotprompt

i have this code line:

…

plot(x,y)

prompt = 'Choose a number';

the problem is that i need to look in the plot at some points before using the prompt command. when i use the 'pause' command it also doesn't help because the pause is cancelled after one mouse click

is there an elegant way to solve this?

Best Answer

You could add a pushbutton to the plot figure or a dialog box maybe, indicating to the user that they can use that button/dialog box to continue execution when they are done staring at the plot.

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MATLAB: What is the uiwait

uiwait(FIG_handle) blocks execution until either UIRESUME is called or the figure FIG is destroyed (closed). uiwait with no input arguments is the same as uiwait(gcf). In this example, a figure is created along with a pushbutton. After the figure is created, uiwait is called until you push the button. When you push the button, the callback calls uiresume.

f = figure('pos',[30 800 250 150]);
h = uicontrol('Position', [20 20 200 40], 'String', 'Continue', ...
              'Callback', 'uiresume(gcbf);close(gcbf)');
disp('This will print immediately');
uiwait(gcf);
disp('This will print after you click Continue');

MATLAB: Does MATLAB not wait for me to click OK in a modal MSGBOX before moving on to the next command in the MATLAB file

Modal is not the same thing as "blocking execution". A modal dialog box prevents the user from interacting with other windows before responding, but does not prevent the remaining code in the MATLAB function from executing. MSGBOX is intended to put up a window containing information, and the "OK" button signifies that a person has seen the information. However, the dialog box does not suspend execution of a MATLAB function until user input.

To have a MATLAB function wait for something to happen before continuing to execute, you can either use a different type of dialog box like QUESTDLG, which is blocking, or you can use the WAITFOR command in conjunction with MSGBOX, which causes MATLAB to block execution until the graphics object is closed.

For example:

waitfor(msgbox('Wait for me.'));
disp('Done waiting.');

will display 'Done waiting' only after the OK button in the MSGBOX has been clicked.

Best Answer

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MATLAB: What is the uiwait

MATLAB: Does MATLAB not wait for me to click OK in a modal MSGBOX before moving on to the next command in the MATLAB file

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