How to use the mouse scroll as a counter in MATLAB?

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Rudy 2015-6-12

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https://ww2.mathworks.cn/matlabcentral/answers/223542-how-to-use-the-mouse-scroll-as-a-counter-in-matlab

评论： Walter Roberson 2015-6-16

Hi there,

I want to use the scroll wheel in a figure. What I for instance want: Take the function f(x) = x^a, where 'x' is something like 1:10 and 'a' a constant. I want to plot f(x), and when I scroll up I want 'a' to increase by one, and when I scroll down I want 'a' to decrease by one and display it right away. Is this possible?

Thank you for your help in advance.

Kind regards, Rudy

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Answer 1

Walter Roberson 2015-6-12

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https://ww2.mathworks.cn/matlabcentral/answers/223542-how-to-use-the-mouse-scroll-as-a-counter-in-matlab#answer_182464

http://www.mathworks.com/matlabcentral/newsreader/view_thread/334027

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Rudy 2015-6-16

Some explanation would be nice.

Walter Roberson 2015-6-16

Set a WindowScrollWheelFcn callback on the figure; see http://www.mathworks.com/help/matlab/ref/figure-properties.html for more information on the Event structure that is passed to it.

Your callback would calculate a new value for "a" and then would call a function to do the plotting for you.

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