Output of callback function

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Ouael Chkoundali 2019-3-13

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评论： Ouael Chkoundali 2019-3-13

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Hi,

on a figure I have 2 axes and a pushbutton. For the pushbutton I used this code to define its callback:

set(button,'Callback',@(hObject,eventdata) button_function(ax1,matrix,ax2) );

The button_function allows to select a part of the input matrix on ax1 and plot it on ax2. And the output of this function is the new matrix (the selected part of the input matrix). To save this new matrix I used this:

new_matrix = set(button,'Callback',@(hObject,eventdata) button_function(ax1,matrix,ax2) );

But the value of new_matrix is [ ] . How can I get it right?

Thanks for your help.

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Ouael Chkoundali 2019-3-13

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Hi Guillaume,

hier is the callback for the pushbutton which oppens the figure:

% --- Executes on button press in pushbutton_3D_Interpretation.
function pushbutton_3D_Interpretation_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton_3D_Interpretation (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
values_matrix = getappdata(Pressure_Evaluation, 'matrix');
values_cropped_matrix = getappdata(Pressure_Evaluation, 'croped_matrix');
vector = values_matrix(:,20);
image = getimage(handles.axes_display_image);
set(0,'defaultfigureposition',[50 40 1000 700]);
fig = figure
pos1 = [0.01 0.2 0.4 0.6];
ax1 = subplot('Position',pos1)
imshow(image);
title('image')
pos2 = [0.5 0.15 0.4 0.7];
ax2 = subplot('Position',pos2)
surf(values_matrix);
button = uicontrol('Style', 'push', 'String', 'Next','Position',...
    [160 5 100 35],'Units','normalized', 'String', 'select area');
set(button,'Callback',@(hObject,eventdata) select_area(ax1,values_matrix,ax2) );
slider = uicontrol('Style','slider','Min',0,'Max',1,'Value',1,...
                'BackgroundColor','white','Position',[570 5 200 20],...
                'Units','normalized');
set(slider,'Callback',@(hObject,eventdata) slider_function(ax2,get(slider,'Value')) )

I know that I should use setappdata and getappdata. But I don't know now where to use them. I just wnat to get the matrix from select_area and use it in slider_function. It's the first time that I use a callback in a callback that's why I coudn't fix it.

Guillaume 2019-3-13

编辑：Guillaume 2019-3-13

So what should happen if the user press on pushbutton_3D_Interpretation a second time?

Ouael Chkoundali 2019-3-13

You have right, it will open a second figure. And I loose the matrix I used in the first figure because it will be updated. It's beeing very complecated. Let's assume that the first figure will be closed if the user press the button a second time. How should I do it?

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