title: Octave: resize figure with subplots
body: <p>I have a simple question about subplots.
  If I write:</p>
  
  <pre><code>x=linspace(0,50,4);
  subplot(1,2,1);
  plot(x,x.^2);
  subplot(1,2,2);
  plot(x,x.^4);
  </code></pre>
  
  <p>I get two very tall and narrow plots in a quadratic window.
  How to change the size of the window that I have two plots of quadratic size
  in a rectangular window whose height is half the width?
  I know how to resize the subplots in the figure window to quadratic plots, but then above them is half the figure empty, and I don't want this.</p>
  
  <p>I asked this also on help@octave.org, but didn't get an answer till now.</p>