在MATLAB中使用连续滑块的值 [英] Use the value of continuous slider in MATLAB

问题描述

我有点呆在这里我试图阅读并实现一些简单的连续滑块脚本（ ），但是我没有得到任何地方。

我只想要去，就是在我滑块中使用连续的滑块值，因为我滑动滑块。但是，我无法弄清楚如何提取滑块的值。

所以，例如，创建一个连续的滑块，然后使用它来改变向量的幅度，就像你连续滑动它。如何做？

谢谢。

解决方案

这个？

  function sliderDemo 
 
f = figure（1）; 
 
％//一些简单的绘图功能（带可调参数）
 x = 0：0.1：2 * pi; 
 y = @（A）A * sin（x）; 
 
％//设置初始情节
 A = 1; 
 p = plot（x，y（A））; 
轴紧
轴（[0 2 * pi -10 10]）
 
％//重新定位轴为滑块腾出空间
 set gca，'position'，[0.1 0.25 0.85 0.7]）; 
 
％//初始化滑块
h = uicontrol（... 
'parent'，f，... 
'units'，'normalized' ..％//所以你不必f * ck与像素
'style'，'slider'，... 
'position'，[0.05 0.05 0.9 0.05]，... 
'min'，1，...％//使A在1 ... 
'max'，10，...％//和10之间，初始值
 'value'，A，...％//如上所述
'callback'，@sliderCallback）; ％//当使用箭头
％//和/或单击滑块时调用
 
 
％// THE MAGIC INGREDIENT 
％// ======================= 
 
 hLstn = handle.listener（h，'ActionEvent'，@ sliderCallback） ; ％＃OK< NASGU> 
％//（变量未使用，但不分配给任何东西意味着
％//监听器存储在'ans'变量中，如果ans被覆盖，
％ //听众超出范围，因此被破坏，因此，它没有
％//更长的工作
 
％// =========== ================ 
 
 
％//滑块的回调：
％// 1）清除旧图
％// 2）使用（连续）更新的滑块值
％// 3）重新绘制绘图并重新设置轴设置
函数sliderCallback（〜，〜） 
 delete（p）; 
 p = plot（x，y（get（h，'value'）））; 
轴紧
轴（[0 2 * pi -10 10]）
 end 
 
 end 
  

PS - 你找不到它不奇怪，没有记录。我从 Yair Altman网站了解到这一点。

I am kinda stuck here. I have tried to read and implement some simple continuous slider scripts, (like this one), but I am not getting anywhere.

What I simply want to go, is use the continuous slider value in my plot, as I slide the slider. However, I cannot figure out how to extract the value of the slider to do so.

So for example, make a continuous slider, and then use it to change the amplitude of a vector lets say, as you continuously slide it. How can that be done?

Thanks.

解决方案

Something like this?

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 - it's not strange that you couldn't find it -- it's not documented. I know this from Yair Altman's site.

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