title: How to plot several curves in MATLAB using handles
body: <p>I am plotting data in MATLAB in real time. I want to use a handle. My problem is I do not know how to plot more than one Y-Data Curve. </p>
  
  <p>I found the following code
  It shows how to plot one set of YData. Has anybody got an idea to transform the code into two or more Y-Datasets, e.g. sind(x) as an additional curve in the plot?</p>
  
  <pre><code>x = 1:1000;
  y = cosd(x);
  
  xi = x(1);
  yi = y(1);
  h = plot(xi, yi, 'YDataSource', 'yi', 'XDataSource', 'xi');
  
  for k = 2:1000...
  xi = x(1:k);
  yi = y(1:k);
  refreshdata(h, 'caller');
  drawnow;
  end;
  </code></pre>