如何从matlab中的数据中提取数据？

Question

我在一个独特的.fig中保存了不同的Matlab图.这个数字是这样的: 现在,我想在这些图中引入滤波器以减少噪声,但遗憾的是我丢失了生成这些信号的代码.
有没有办法提取该图中每个信号的数据？我试过这个:

open('ttc_delay1000.fig'); 
h = gcf; %current figure handle
axesObjs = get(h, 'Children');  %axes handles
dataObjs = get(axesObjs, 'Children'); %handles to low-level graphics objects in axes

objTypes = get(dataObjs, 'Type');  %type of low-level graphics object

xdata = get(dataObjs, 'XData');  %data from low-level grahics objects
ydata = get(dataObjs, 'YData');

但我很困惑,我不知道这是否是正确的行动方式.谢谢!

Answer 1

一个问题的单线程:

data = get(findobj(open('ttc_delay1000.fig'), 'Type','line'), {'XData','YData'});

这些步骤(从内部调用到外部调用):

• 打开文件;
• 看看它的线系列;
• 返回数据.

data{n,1}将包含XData的的LineSeries数量n,诡计的data{n,2}将包含YData上述的LineSeries.

如果你想直接在图中平滑线条,想法是一样的:

    %//Prepare moving average filter of size N
    N = 5;
    f = @(x) filter(ones(1,N)/N, 1, x);

    %//Smooth out the Y data of the LineSeries
    hf = open('ttc_delay1000.fig');
    for hl = transpose(findobj(hf,'Type','line'))
            set(hl, 'YData', f(get(hl,'YData')));
    end;
    saveas(hf, 'ttc_delay1000_smooth.fig');