title: R - Compute Cross Product of Vectors (Physics)
body: <p>What am I doing wrong?</p>
  
  <pre><code>&gt; crossprod(1:3,4:6)
       [,1]
  [1,]   32
  </code></pre>
  
  <p>According to this website:<a href="http://onlinemschool.com/math/assistance/vector/multiply1/" rel="nofollow noreferrer">http://onlinemschool.com/math/assistance/vector/multiply1/</a></p>
  
  <p>It should give:</p>
  
  <pre><code>{-3; 6; -3}
  </code></pre>
  
  <p>See also <a href="https://stackoverflow.com/questions/15162741/what-is-rs-crossproduct-function">What is R&#39;s crossproduct function?</a></p>