title: replace the values of column with corresponding row name
body: <p>I have data frame as follows.</p>
  
  <pre><code>ID      e200 e200_cyp  e200_rad e200_obl
  OTU_1    1        1        1        1
  OTU_2    1        1        1        1
  OTU_17   0        0        0        0
  OTU_13   1        1        1        1
  OTU_10   0        1        0        1
  OTU_20   1        0        1        0
  </code></pre>
  
  <p>I want to replace the value 1 of every column by the corresponding row ID.
  Any help please?
  Thank you very much</p>