title: Is there anyway to delete rownames in R?
body: <p>I made a table like this table name a.</p>
  
  <pre><code>   variable relative_importance scaled_importance percentage
  1      x005        68046.078125          1.000000   0.195396
  2      x004        63890.796875          0.938934   0.183464
  3      x007        48253.820312          0.709134   0.138562
  4      x012        43492.117188          0.639157   0.124889
  5      x008        43132.035156          0.633865   0.123855
  6      x013        32495.070312          0.477545   0.093310
  7      x009        18466.910156          0.271388   0.053028
  8      x015        10625.453125          0.156151   0.030511
  9      x010         8893.750977          0.130702   0.025539
  10     x014         4904.361816          0.072074   0.014083
  11     x002         1812.269531          0.026633   0.005204
  12     x001         1704.574585          0.025050   0.004895
  13     x006         1438.692139          0.021143   0.004131
  14     x011         1080.584106          0.015880   0.003103
  15     x003           10.152302          0.000149   0.000029
  </code></pre>
  
  <p>and use this code to order that table.</p>
  
  <pre><code>setorder(a,variable)
  </code></pre>
  
  <p>and want to get only second column.</p>
  
  <pre><code>a[2]
  
     relative_importance
  12            380.4296
  11            645.4594
  15             10.1440
  4            8599.7715
  2           10749.5752
  13            263.7065
  5            8434.3760
  6            7443.8530
  7            3602.8850
  10            935.6713
  14            256.7183
  3            9160.4062
  1           12071.1826
  9            1173.0701
  8            1698.0955
  </code></pre>
  
  <p>I want to copy "relative_importance" and paste in Excel.
  But, I couldn't delete the rownames. (12,11,15...,9,8)
  Is there any way to print only "relative_importance"? (print without rownames or hide rownames)</p>
  
  <p>Thank you :)</p>