title: using pairwise pmin() on two list of a list
body: <p>so I have two list with similar size like the code below:</p>
  <pre><code>a &lt;- list(1,2,3,4)
  b &lt;- list(6,7,8,9)
  c &lt;- list(10,11,12,13)
  all &lt;- list(a,b,c)
  
  a1 &lt;- list(12,13,115,90)
  b1 &lt;- list(60,70,80,09)
  c1 &lt;- list(100,110,120,130)
  all1 &lt;- list(a1,b1,c1)
  </code></pre>
  <p>and i am trying to use the <strong>pmax()</strong> to calculate the max values between those two list but I keep getting error like below:</p>
  <pre><code>Error in mmm &lt; each : comparison of these types is not implemented
  </code></pre>