title: Plotting the clamp function on wolframalpha
body: <p>It's not obvious to me how to plot on wolframalpha a function that contains conditionals, the one I have in mind is:</p>
  
  <pre><code>clamp lowerBound upperBound i
    | i &gt; upperBound = upperBound
    | i &lt; lowerBound = lowerBound
    | otherwise      = i
  </code></pre>