MATLAB: Slider y lim multiply

sliderylim;

Hi, I need help. I have a slider for moving up and down in my axes. It works, BUT I have a button for multiply the signal (2x,3x,4x) and in these case I am setting the max and minimum value of slider, and after each push of multiply button I want to set value of slider to minimum value, but it doesn't work I have the error:

Warning: 'slider' control cannot have a 'Value' outside of 'Min'-'Max' range
Control will not be rendered until all of its parameter values are valid 
        set(handles.slider,'Min',handles.minimum)
        set(handles.slider,'Max',handles.maximum+(handles.c_channel-1)*256)
        set(handles.slider,'Value',handles.minimum)

Can anybody help me with this problem, thanks

Best Answer

      set(handles.slider, 'Value',handles.minimum, ...
                          'Min',handles.minimum, ...
                          'Max',handles.maximum+(handles.c_channel-1)*256));

Now the 'Value' is valid at each time, because all properties are changed simultaneously. Alternatively set the 'Value' at first before changing the limits.

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MATLAB: Slider in GUI

not working? how can we help if you don't provide enough details (error message at least), please be sure that variablemax and min are numbers (use str2num if it's a string) not strings or a cell. Also remeber to update the handles structure after setting the new values.

prompt = {'Enter min:','Enter max:'};
dlg_title = 'min=?,max=?';
num_lines = 1;
def = {'0','1'};
answer = inputdlg(prompt,dlg_title,num_lines,def);
%answer is a cell with two strings
%You must choose the cell element answer{n} , that gives you the string
%first one is the min and the second is the max
%Now you need to convert string to number, that can be done using str2num
variableMin=str2num(answer{1});
variableMax=str2num(answer{2});
set(handles.slider1,'Max',variableMax);
set(handles.slider1,'Min',variableMin);
% Update handles structure
guidata(hObject, handles);

MATLAB: Help with slider in matlab GUI

Set up the slider like this in your start up code (untested):

sliderMin = get(handles.slider, 'Min');
sliderMax = get(handles.slider, 'Max');
increment = 1/(sliderMax-sliderMin);
sliderStep = set(handles.slider, 'Step', [increment, 2*increment]);

To get the integer value later:

sliderValue = round(get(handles.slider, 'Value'));

Best Answer

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MATLAB: Slider in GUI

MATLAB: Help with slider in matlab GUI

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