MATLAB: How to set the slider step value in Matlab

sliderstep

I want my GUI slider step to start from 1 to 80. Need it to set from 1 to 80 with increment of 1 for every step. I have set the min and max in the property inspector. and the slider step to [1/79 0.1] but its increasing with decimal places.

Example of output = 0,1.04,2.08,…

I am using R2014b

Best Answer

It is not clear to me, when the value "is increasing in decimal places".

uicontrol('Style', 'Slider', ...
          'SliderStep', [1/79, 0.1], ...
          'Min', 1, 'Max', 80, 'Value', 1, ...
          'Callback', 'disp(get(gcbo, ''Value''))')

Now hitting the arrows increase the value by 1. But hitting in the area increases the value by 7.9 as expected. To get integer results, you can adjust the value in the callback:

uicontrol('Style', 'Slider', ...
          'SliderStep', [1/79, 0.1], ...
          'Min', 1, 'Max', 80, 'Value', 1, ...
          'Callback', @sliderCallback)
function sliderCallback(hObject, EventData)
Value = round(get(hObject, 'Value'));
set(hObject, 'Value', Value);

Now the value is rounded after each interaction.

Related Solutions

MATLAB: Increasing slider value of a GUI

See https://www.mathworks.com/help/matlab/ref/uicontrol-properties.html#property_SliderStep

figure;
uicontrol('Style', 'Slider', 'Position', [10, 10, 200,20], ...
          'SliderStep', [1/29, 0.1], ...
          'Min', 10, 'Max', 300, 'Value', 10, ...
          'Callback', 'disp(get(gcbo, ''Value''))')

The range goes from 10 to 300, which is a distance of 290. To get a stepsize of 10, the SliderStep must be 10/290, or 1/29. You should expect rounding errors, so fix the value in the callback:

uicontrol('Style', 'Slider', 'Position', [10, 10, 200,20], ...
          'SliderStep', [1/29, 0.1], ...
          'Min', 10, 'Max', 300, 'Value', 10, ...
          'Callback', mySliderCB);
function mySliderCB(SliderH, EventData)
Value = round(get(SliderH, 'Value'));
set(SliderH, 'Value', Value);
...

MATLAB: I need help for this, setting slider steps!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

In code (your m-file) you can get the min and max and make the step one over the range:

maxSliderValue = get(handles.slider1, 'Max');
minSliderValue = get(handles.slider1, 'Min');
theRange = maxSliderValue - minSliderValue;
steps = [1/theRange, 10/theRange];
set(handles.slider1, 'SliderStep', steps);

Put this in your GUI's OpeningFcn function or whenever you change the slider's max value (which you probably don't do in your program.)

If you do it in the Property Inspector and have 1 as the min and 80 as the max, you should set the small step to 1/79 = 0.012658227848101, and the large step as some multiple of that, like 2 or 3 times as large.

Best Answer

Related Solutions

MATLAB: Increasing slider value of a GUI

MATLAB: I need help for this, setting slider steps!!!!!​!!!!!!!!!!​!!!!!!!!!!​!!!!

Related Question

MATLAB: I need help for this, setting slider steps!!!!!!!!!!!!!!!!!!!!!!!!!!!!!