MATLAB: How to increase GUI slider steps

guiguideslidersliderstepstep

I have 168 MRI images to scroll. But my slider goes 1,3,5,6,8,10…almost every second image is shown. I've count them and turn out to be that slider has a exactly hundred steps. How can I increase that steps that slider shows one by one image?

Thanks.

Best Answer

To setup:

maxNumberOfImages = 168;
set(handleToSlider, 'Min', 1);
set(handleToSlider, 'Max', maxNumberOfImages);
set(handleToSlider, 'Value', 1);
set(handleToSlider, 'SliderStep', [1/(maxNumberOfImages-1) , 10/(maxNumberOfImages-1) ]);

To use and find out which value the user is on:

imageNumberSelected = int32(get(handleToSlider, 'Value'));

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: How to change range of slider (GUI)

Then try using set():

set(handleToSlider, 'min', 61);
set(handleToSlider, 'max', 250);
set(handleToSlider, 'Value', 100); % Somewhere between max and min.

Best Answer

Related Solutions

MATLAB: Increasing slider value of a GUI

MATLAB: How to change range of slider (GUI)

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