title: MATLAB : How to plot pdf
body: <p>I want to plot the following on the same piece of paper.</p>
  
  <p>The pdf of exponential distribution with parameter 5
  The pdf of t distribution with parameter 15</p>
  
  <p>I don't know how to draw the pdf but know how to plot several figure on the same piece of paper by using command <code>subplot()</code></p>