how to break line in prompt text

Question

reema 2014-7-21

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评论： reema 2014-8-10

i want to display a list in prompt dialogbox..how to usee break line in it likee i want to display text like that:

select songs from below list:
1.namee of songss:
2.name of songs:
3. name of songs:
etc

how can i display this in prompt dialog box

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Answer 1

Geoff Hayes 2014-7-22

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Why not use a listdlg instead? It allows you to create a cell array of strings (in your case song titles) which is then displayed in a dialog that the user can select from

 strs  = {'1. name of song', '2. name of song', '3. name of song'};
 prmpt = 'Select songs from below list:';
 [s,v] = listdlg('PromptString',prmpt,'SelectionMode','multi','ListString',strs);

Try the above and see what happens!

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reema 2014-7-22

在 MATLAB Online 中打开

when mee aplly the switch statement with thiss see code:

strs  = {'1. name of song', '2. name of song', '3. name of song'};
 prmpt = 'Select songs from below list:';
 [s,v] = listdlg('PromptString',prmpt,'SelectionMode','multi','ListString',strs);
 switch strs
       case 1
           hmfr = dsp.AudioFileReader('21.mp3');
        hap = dsp.AudioPlayer('SampleRate', hmfr.SampleRate);
        while ~isDone(hmfr)
           audio = step(hmfr);
           step(hap, audio);
        end
        release(hmfr); % release the input file
        release(hap);  % release the audio output device
       case 2
           hmfr = dsp.AudioFileReader('21.mp3');
        hap = dsp.AudioPlayer('SampleRate', hmfr.SampleRate);
        while ~isDone(hmfr)
           audio = step(hmfr);
           step(hap, audio);
        end
        release(hmfr); % release the input file
        release(hap);  % release the audio output device
       otherwise
            hmfr = dsp.AudioFileReader('21.mp3');
        hap = dsp.AudioPlayer('SampleRate', hmfr.SampleRate);
        while ~isDone(hmfr)
           audio = step(hmfr);
           step(hap, audio);
        end
        release(hmfr); % release the input file
        release(hap);  % release the audio output device
   end

then its givee errorr like:

    >> prompt
    SWITCH expression must be a scalar or string constant.
    Error in prompt (line 4)
     switch strs
 how can i remove thisss error?

Geoff Hayes 2014-8-10

I'm not sure - it may be one of those undocumented (and so unsupported) features that is possible when you start playing with the Java equivalent for the list box widget.

reema 2014-8-10