edit text, push button and output.

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Muhammad Taqi 2012-4-23

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Dear All, while working for my university project, am bit stuck in the final steps of GUI. Have compiled a code for Huffman coding. what my requirement is to get input from user which i am able to by creating GUI and placing edit text. Also am able to get entered text.

f  unction CODE_Callback(hObject, eventdata, handles)
      % hObject    handle to CODE (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
data=get(hObject,'String');
% Hints: get(hObject,'String') returns contents of CODE as text
%        str2double(get(hObject,'String')) returns contents of  CODE as a double

Now i need help to communicate entered text (variable named as "data") with start button to run the complete program. and also to show final output on GUI (text based output)

% --- Executes on button press in START.
function START_Callback(hObject, eventdata, handles)
% hObject    handle to START (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
huff (data); % calling main program for huffman coding

-----%%%%%%-----------

disp(strcat('Entropy = ',num2str(entropy)));
 disp(strcat('Average length = ',num2str(avglength)));
 disp(strcat('Redundancy = ',num2str(redundancy)));
 encseq=huffencode(huf,seq);
 disp('Sequence :');
 disp(seq);
 disp('Encoded Sequence :');
 disp(encseq);
 decseq=huffdecode(huf,encseq);
 disp('Decoded Sequence :');
 disp(decseq);

(Want to display all output on GUI)

Urgent help will be highly appreciated. Thanks in advance.

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Muhammad Taqi 2012-4-23

Wholla,,,, I managed to figure out my first query, did managed to make start button work.

Help regarding output is required.

thanks :)

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Answer 1

Daniel Shub 2012-4-23

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在 MATLAB Online 中打开

If you make an additional text box on your gui you can then set the string of that text box to be str where

str = {
  strcat('Entropy = ',num2str(entropy))
  strcat('Average length = ',num2str(avglength))
  strcat('Redundancy = ',num2str(redundancy))
  ...
  }

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Muhammad Taqi 2012-4-23

So what should i do for the new function to work??

Daniel Shub 2012-4-24

You need to read about how to create functions and guis in MATLAB.

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Answer 2

Image Analyst 2012-4-23

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https://ww2.mathworks.cn/matlabcentral/answers/36253-edit-text-push-button-and-output#answer_45403

在 MATLAB Online 中打开

Don't use disp() because that outputs to the command window. If you want it to go to your GUI, use set(). Lets say you have a static text control called txtInfo. Then you can use this code:

% Create string for output that we can send to the text control.
txtInfo = sprintf('Entropy = %.4f\nAverage length = %.4f\nRedundancy = %.4f', entropy, avglength, redundancy); 
% Now, send the string to the control called txtInfo
set(handles.txtInfo, 'String', txtInfo);

If that is in a tight loop, you might also need to add a "drawnow" to get it to update immediately.

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Muhammad Taqi 2012-4-24

Thanks @image analyst for your reply.

Am at novice level of matlab programming and little more help will be highly appreciated.

At the moment, i have 2 .m files, one for gui & other for main program.

the loop and all disp commands are in main program m file, where as the output to be displayed is in gui for which i believe above commands must be in gui's m file. So how to transfer that loop to gui's m file.

Below mentioned code is my main program code.

how will i shift to GUI's m file.

function huff(data) %% data is value taken from user from GUI.

clc;

%fid=fopen('seq.txt','r');

seq5=data;

%seq=fread(fid,'*char');

%fclose(fid);

seq5=reshape(seq5,1,length(seq5));

testing(seq5);

[alpha prob]=probmodel(seq)

if ~isempty(alpha)

[huf entropy avglength redundancy]=huffman(alpha,prob);

if ~isempty(huf)

lp=length(prob);

for i=1:lp

str=huf(i).sym;

str=strcat(str,' :');

str=strcat(str,num2str(huf(i).prob));

str=strcat(str,' :');

str=strcat(str,huf(i).code);

disp(str);

end

disp(strcat('Entropy = ',num2str(entropy)));

disp(strcat('Average length = ',num2str(avglength)));

disp(strcat('Redundancy = ',num2str(redundancy)));

encseq=huffencode(huf,seq);

disp('Sequence :');

disp(seq);

disp('Encoded Sequence :');

disp(encseq);

decseq=huffdecode(huf,encseq);

disp('Decoded Sequence :');

disp(decseq);

end

else

display('Empty Sequence....');

end

Muhammad Taqi 2012-4-24

Well, if i replace disp() with set(), its still giving an error.

??? Undefined variable "handles" or class "handles.txtInfo".

Muhammad Taqi 2012-4-24

Also, i tried creating an output function as

txtInfo = sprintf('Entropy = %.4f\nAverage length = %.4f\nRedundancy = %.4f', entropy, avglength, redundancy);

then i want to transfer that string to my GUI function for display.

How should i sent there?

Have named my GUI file as TEST2.

function varargout = TEST2(varargin)

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edit text, push button and output.

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edit text, push button and output.

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