title: How to normalize / denormalize a vector to range [-1;1]
body: <p>How can I <em>normalize</em> a vector to the range <code>[-1;1]</code></p>
  
  <p>I would like to use function <code>norm</code>, because it will be faster.</p>
  
  <p>Also let me know how I can <em>denormalize</em> that vector after <em>normalization</em>?</p>