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How to append lines to an existing MessageBox

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Fabio Pasquarella
Fabio Pasquarella on 21 Dec 2017
Hello, my output is written on a msgbox. Later in the program I need to append some more output lines. How can i perform this? Thank you

Answers (1)

Ramnarayan Krishnamurthy
Ramnarayan Krishnamurthy on 29 Dec 2017
The following is a possible approach to append messages in the msgbox after its creation.
% Create a message box
h = msgbox('Hi');
% Set the size of the msgbox to accommodate more lines
set(h,'units','normalized' ,'position', [0.5 0.5 0.2 0.2])
% Find the text in the msgbox using the tag to identify the msgbox
a = findobj(h,'Tag','MessageBox')
% Append lines below
a.String{end+1} = 'Line 1 Added';
a.String{end+1} = 'Line 2 Added';
% Add extra text in the same line
a.String{end} = a.String{end}+" "+ "More text..."
To include a variable in the message box, the link below may help:


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