GUI: adjust axes values with 2 different sliders

I want to select 2 values chosen by 2 different sliders and set these values as the min and max of an axes. So, slider_a should give the min value of the axes, slider_b the max value of the axes. I failed to do so... here my initial code:

 function slider1_Callback(hObject, eventdata, handles)
 % hObject    handle to slider1 (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,'Value') returns position of slider
 %        get(hObject,'Min') and get(hObject,'Max') to determine range of slider
 slider1_val=get(handles.slider1,'value')
 set(handles.text1,'string',slider1_val)
 get(handles.axes1,'Xlim')
 set(handles.axes1,'Xlim',slider1_val) %%x min value should be slider1 val.; max slider2 val.

Answer 1

[Geoff Hayes]

Marcel - you almost have the correct code, you just need to pass a vector as the value for the Xlim parameter. Since slider1 corresponds to the minimum value for you axes limit, then just change the above code to

 function slider1_Callback(hObject, eventdata, handles)

     minVal = get(handles.slider1,'Value');
     maxVal = get(handles.slider2,'Value');

     set(handles.axes1,'Xlim',[minVal maxVal],'XTick',floor(linspace(minVal,maxVal,5)));

I've added the XTick parameter so that the x-axis ticks are linearly spaced from the minimum to the maximum value along the axis (there are 5 ticks displayed).

And this same code can be re-used for the slider2_Callback. In order to prevent code duplication, you can do something like the following

 function slider1_Callback(hObject, eventdata, handles)
     adjustAxisLimits(handles);

 function slider2_Callback(hObject, eventdata, handles)
     adjustAxisLimits(handles);

 function adjustAxisLimits(handles)

     minVal = get(handles.slider1,'Value');
     maxVal = get(handles.slider2,'Value');

     set(handles.axes1,'Xlim',[minVal maxVal],'XTick',floor(linspace(minVal,maxVal,5)));

So both slider callbacks call the same function to adjust the limits.

[Marcel]

awesome, it worked! And I was not that wrong :)