7

我有点卡在这里。我试图阅读和实现一些简单的连续滑块脚本，（比如这个），但我没有得到任何结果。

我只是想去，在我滑动滑块时使用我的情节中的连续滑块值。但是，我无法弄清楚如何提取滑块的值来这样做。

例如，制作一个连续滑块，然后用它来改变向量的幅度，比如说，当你连续滑动它时。怎么可能呢？

谢谢。

4

3 回答 3

10

像这样的东西？

function sliderDemo

    f = figure(1);

    %// Some simple to plot function (with tuneable parameter)
    x = 0:0.1:2*pi;
    y = @(A) A*sin(x);

    %// Make initial plot
    A = 1;
    p = plot(x, y(A));
    axis tight
    axis([0 2*pi -10 10])

    %// re-position the axes to make room for the slider
    set(gca, 'position', [0.1 0.25 0.85 0.7]);

    %// initialize the slider
    h = uicontrol(...
        'parent'  , f,...        
        'units'   , 'normalized',...    %// so yo don't have to f*ck with pixels
        'style'   , 'slider',...        
        'position', [0.05 0.05 0.9 0.05],...
        'min'     , 1,...               %// Make the A between 1...
        'max'     , 10,...              %// and 10, with initial value
        'value'   , A,...               %// as set above.
        'callback', @sliderCallback);   %// This is called when using the arrows
                                        %// and/or when clicking the slider bar


    %// THE MAGIC INGREDIENT
    %// ===========================

    hLstn = handle.listener(h,'ActionEvent',@sliderCallback); %#ok<NASGU>
    %// (variable appears unused, but not assigning it to anything means that 
    %// the listener is stored in the 'ans' variable. If "ans" is overwritten, 
    %// the listener goes out of scope and is thus destroyed, and thus, it no 
    %// longer works.

    %// ===========================


    %// The slider's callback:
    %//    1) clears the old plot
    %//    2) computes new values using the (continuously) updated slider values
    %//    3) re-draw the plot and re-set the axes settings
    function sliderCallback(~,~)
        delete(p);
        p = plot(x, y(get(h,'value')));
        axis tight
        axis([0 2*pi -10 10])
    end

end

PS - 你找不到它并不奇怪 - 它没有记录。我从Yair Altman 的网站上知道这一点。

于 2013-10-24T06:12:16.180 回答
2

从 Matlab 2014a 开始，您可以使用：

addlistener(h_slider,'ContinuousValueChange',@slider);

@slider要定义的回调函数在哪里。工作整洁。

在回调中，您可以简单地使用：

slider_value=get(handle,'value');

（来源）

于 2015-01-01T13:32:30.177 回答
1

要从滑块中提取值，请使用get滑块句柄的方法如下，

sliderValue = get(hSlider,'Value')
于 2013-10-24T06:13:10.207 回答