How to get the values of graphs interactively in a matlab GUI

I have this code which helps me to get t1,t2 manually and then get delt How to bring in a graph and then select points interactively to get delt

--- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
t1=get(handles.edit5,'string');
format long
t1=str2num(t1);
t2=get(handles.edit6,'string');
format long
t2=str2num(t2);

delt=(t2-t1);
set(handles.edit9,'string',delt);

[Geoff Hayes]

Kaleesh - what happens when you use ginput?

 [x,y] = ginput(2); % since you want 2 points

 % now calculate the delta between the x or y 
 % (not sure which is your t)

[Ramesh Bala]

Danke Geoff for the reply. I actually used Gpts to get the X1,X2 as T1 and T2.

addpath 'C:\Users\Desktop\50-300\' I = imread('7,1.png');

I = imread('7,1.png');

image(I);figure(gcf);

[x] = getpts;

delt=(x(2,2)-x(2,1)); set(handles.edit9,'string',delt);

But,now the figure comes I select two points gets X values. Now I'm unable to substitute those X values to edit box ? Earlier the edit boxes were created just to get the values and then do the calculation.

Is there any way to subsitute the obtained X1,X2 values to those edit tabs

function edit5_Callback(hObject, eventdata, handles)

% hObject handle to edit5 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit5 as text

% str2double(get(hObject,'String')) returns contents of edit5 as a double

% --- Executes during object creation, after setting all properties.

function edit5_CreateFcn(hObject, eventdata, handles)

% hObject handle to edit5 (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.

% See ISPC and COMPUTER.

if ispc && isequal(get(hObject,'BackgroundColor'),

get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white');

end

So how to use edit 5 to get X1 and edit 6 to get X2

Answer 1

[Geoff Hayes]

Kaleesh - if you are just trying to update your edit text controls with the values that you have obtained using getpts then you could try

 function some_callback(hObject, eventdata, handles)
 I = imread('7,1.png');
 image(I);figure(gcf);
 [x] = getpts;
 delt=(x(2,2)-x(2,1)); 
 set(handles.edit9,'string',num2str(delt));
 set(handles.edit5,'string',num2str(x(2,1)));
 set(handles.edit6,'string',num2str(x(2,2)));

So just convert the number into a string using num2str.

[Ramesh Bala]

Danke Schon Geoff for your reply; Actually I tried to even simply it by calculating directly from the pushbutton itself;

function pushbutton2_Callback(hObject, eventdata, handles)

% % hObject handle to pushbutton2 (see GCBO)

% % eventdata reserved - to be defined in a future version of MATLAB

% % handles structure with handles and user data (see GUIDATA)

addpath 'C:\Users\5cycle-50-300\'

I = imread('7,1.png');

image(I);figure(gcf);

[x] = ginput(2);

delt=(x(2,2)-x(2,1));

set(handles.edit9,'string',delt);

Everything seems fine except the image comes into the GUI itself. Is there any way to make it appear separately so that I can use either Ginput or getpts on it. Also whether the below function works to browse the pictures and then bringing it into that separate GUI or Figure section?

[filename, pathname] = uigetfile ('*.png', 'Pick a .PNG image');

img=imread([pathname, filename]);

imshow(img,'Parent',handles.axes1);

[Geoff Hayes]

Kaleesh - if you want the image to appear in a separate figure, then you probably need to create a new figure before calling image (or, include an axes control in your GUI to show the image there).

[Ramesh Bala]

Haello Geoff

Could you please kindly elaborate how to call a new figure before image?

Also I have modified mine to uiopen -which helps to browse for the figure and then select it ,won't work for png,tiff etc except .m files

function some_callback(hObject, eventdata, handles)

uiopen

zoom on;

pause() % you can zoom with your mouse and when your image is okay, you press any key'

zoom off; % to escape the zoom mode

pan off;

[x] = ginput(2)

delt=(x(2,2)-x(2,1));

fprintf('x2 = %f\n', x(2,2));

fprintf('x1 = %f\n', x(2,1));

zoom out; % go to the original size of your image

set(handles.edit9,'string',delt);

[Geoff Hayes]

Kaleesh - just create a new figure as

 fHandle = figure;

then that figure becomes the current figure and so your image should be drawn to it.

[Ramesh Bala]

Sehr Gut !! :) Thanks for the valuable comments!