make a GUI in matlab

the problem is to read the text from those files, show it on screen under respective heading and allow the user to change the same. Once values are modified, after clicking ok modified value to be overwritten in respective files.

pls suggest the code for this problem.

Answer 1

[Jan]

This is exactly what Matlab's editor does already. Why do you want to re-create such a standard tool?

But if you really want to do this, what does "show it on screen under respective heading" mean? A uitabgroup? While it is not very complicated to create such a tab group and add some buttons for loading and saving, this is a tedious work. Try to start writing a solution and ask a specific question.

[raviranjan singh]

 i call the text file but the problem is in the modified value
 to be not  overwritten in respective files.

i cant understand how to modified and change in save text file.

[Jan]

This details sounds trivial actually:

str = fileread(FileName);
set(handles.edit1, 'String', str, 'Min', 0, 'Max', 2);
% Set Min and Max to let it be a multi-line edit field
...  Now modify the text as you want.

% Saving:
[fid, msg] = fopen(FileName, 'w')
if fid == -1
  error('Cannot open file: %s: %s', FileName, msg);
end
fwrite(fid, get(handles.edit1, 'String'), 'char');
fclose(fid);

Or in words: Import the file's contents, edit it and save it. But as said already, the editor is the perfect tool for this already:

edit(FileName);

The rest is implemented there already.

If you have any otehr problem, pleas exaplain it explicitely.

[raviranjan singh]

at % saving section, the data is not save as seen in the edit1 section. the content read horizontally in respect to line by line.

[Jan]

What is the difference between "horizontally" and "line by line"? Please explain the details.

Maybe it helps to use cell strings:

cstr = strsplit(fileread(FileName), '\n');
set(handles.edit1, 'String', cstr, 'Min', 0, 'Max', 2);
% Set Min and Max to let it be a multi-line edit field
...  Now modify the text as you want.

% Saving:
[fid, msg] = fopen(FileName, 'w')
if fid == -1
  error('Cannot open file: %s: %s', FileName, msg);
end
cstr = get(handles.edit1, 'String');
fprintf(fid, '%s\n', cstr{:});
fclose(fid);

[raviranjan singh]

thanks for helping but one problem is that after opening of text file the content is writing horizontally after change in value in edit 1 and save as shown in figure 2. but originally it seen as original text it is figure 1.

[Jan]

This is a problem of Notepad. All other editors can handle \n as line break reliably, but Notepad requires \r\n. Replace it by a smarter editor like WordPad or Notepad++. But if you really want to use this darn old poor editor, replace:

fprintf(fid, '%s\n', cstr{:})

by

fprintf(fid, '%s\r\n', cstr{:})

or open the file in text mode by:

[fid, msg] = fopen(FileName, 'wt')

I'd prefer to omit Notepad.

[raviranjan singh]

thanks. it works properly.