How to use two sliders logarithmically spaced to update the plot on the same figure as the sliders are moved?

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subharthi chowdhuri 2017-8-27

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https://ww2.mathworks.cn/matlabcentral/answers/354195-how-to-use-two-sliders-logarithmically-spaced-to-update-the-plot-on-the-same-figure-as-the-sliders-a

关闭： subharthi chowdhuri 2017-8-27

Hello all, I am facing quite a problem with the usage of sliders. I have created a function which takes two inputs a and b, and accordingly, returns x and y. I plot x and y on a log-log axis to see how the output behaves.

Now I want to create two sliders for a and b spaced logarithmically, so by moving both of the sliders, I can see how the plot changes. I want to update my current figure with the change in a and b through the sliders.

I am at my wit's end on how to solve this problem and I would greatly acknowledge help from the people here.

Thanks, Subharthi

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Jan 2017-8-27

编辑：Jan 2017-8-27

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The slider works with a linear range and steps only, but it is trivial to calculate the exponentional (not logarithm):

uicontrol('Style', 'Slider', 'Min', 0, 'Max', 3, ...
          'SliderStep', [0.1, 0.1], ...
          'Callback', @SliderCallbackA);
...
function SliderCallbackA(SliderH, EventData)
Value = get(SliderH);
a     = 10 ^ Value;
disp(a)
... now do with a what you want:
updateDiagram('a', a);
% And in the other slider callback:
% updateDiagram('b', a);
end

Creating two sliders works exactly as creating one slider, only do it twice. Perhaps you want to share the values of a and b in the handles struct. Search for "share variables between callbacks" in the forum.

You did not provide any code yet, therefore my "updateDiagram" is a bold guess only. Again: Please post, what you have tried so far, such that suggesting the further steps does not require to guess the complete code.

subharthi chowdhuri 2017-8-27