title: Plotting and Saving as File in MATLAB
body: <p>I need to plot and save to image file in MATLAB. Here is the code that I am calling inside a 'for' loop:</p>
  
  <pre><code>figure
  scatter(data_x_pos,data_y_pos,'r*')
  hold on
  scatter(data_x_neg,data_y_neg,'b')
  t = linspace(-80,80);
  y = -model.w(1)*t/model.w(2);
  plot(t,y,'k');
  % need to save this plot to image to a file here
  </code></pre>
  
  <p>Now, this is starter code that I am using for some work and I don't understand it completely (example - the command 'figure'). There have been suggestions to use <strong>saveas</strong> or <strong>print</strong> but I believe I need handles for them. Could someone help me out here?</p>
  
  <p>Thanks.</p>