multiple lines in static text box

The following code I have used is for displaying the string in a static text box which is present in a GUI designed using MATLAB.Since, the output is genersted during runtime only the last line is displayed.For example,

    function matchin
    handles = guidata(gcbo);
    set(handles.h_text,'String','performing matching...');
    [image1, pathname]= uigetfile('*.bmp','Open An Fingerprint image');
    Directory = fullfile ('C:','Users','ADMIN','Documents','MATLAB');
    set(handles.h_text,'String','matching complete...');
    D = dir(fullfile(Directory,'*.bmp'));
    for i = 1:numel(D)
       if isequal(image1,D(i).name)
          set(handles.h_text,'String','matched');
       else       
          set(handles.h_text,'String','not matched');
       end
   end

If I select the second image out of three images it is displaying

    not matched
    matched
    not matched

in the matlab command window but, the static text box in GUI is displaying

    not matched

How can I display multiple lines in the static text box?

Answer 1

[Image Analyst]

Use sprintf() to build up your string. Use the prior version of the string so you can append to it. And like Walter said, set the max property of the static text control to 2. Run this snippet for a demo:

message = '';
for k = 1 : 10
  message = sprintf('%sThis is line #%d\n', message, k)
end

[Padmapriya]

I have changed the "for" loop with the following code

   message='';
    for i = 1:numel(D)
       if isequal(image1,D(i).name)
           message=sprintf('%s\n%s',message,matched);
           set(handles.h_text,'String',message);
       else       
           message=sprintf('%s\n%s',message,notmatched);
           set(handles.h_text,'String',message);
       end
    end

But I am getting the error stating that

Undefined function or variable 'matched'.

 Error in matchin (line 31)

           message=sprintf('%s\n%s',message,matched);

 Error while evaluating uicontrol Callback

Where have I gone wrong?

[Padmapriya]

I corrected the error myself..Thanks for your help. I am very thankful.

[Alexei]

Hi, Image Analyst. What is the meaning of setting the max property of the static text control to 2? I right clicked on it and selected the "What's this?" pop-up, but the box that came up does not actually mention static text boxes. Thank you!

[Image Analyst]

That lets the sentences wrap instead of being all on one long line.

[Marie]

This worked great! I was wondering how I could do this if I wanted each line to start with a new phrase. I want to plot in my textbox n =1, A=3, and B=4 on seperate lines.

[Image Analyst]

@Marie did you try something like

app.textbox1.Value = sprintf('n=1\nA=3\nB=4');

Answer 2

[Walter Roberson]

Each time through the "for i" loop, you are overwriting the existing String property with a single entry, so of course it is only displaying one entry.

In order to display multiple lines in a static text box, pass a cell array of strings as the String property. You might also need to set the Max parameter of the uicontrol to be 2.

I will leave it to you to figure out how to construct the cell array of strings you are going to set() the String property to.