title: Pandas: equal values from different rows
body: <p>Data Frame Example:</p>
  <pre><code>    A           B
  0   2.234560    0.842407
  1   0.842407    2.234560
  2   3.183770    1.200300
  3   1.200300    3.18377
  </code></pre>
  <p>I am trying to add a new column about the matching of values from 'A' and 'B' columns</p>
  <p>Like this:</p>
  <pre><code>    A           B           C
  0   2.234560    0.842407    A0 Matching with B1
  1   0.842407    2.234560    B1 Matching with A0 
  2   3.183770    1.200300    A2 Matching with B3
  3   1.200300    3.183770    B3 Matching with A2 
  </code></pre>
  <p>What is the right solution?</p>