text: user4595: I have 48 files in which I have
  r1
  Organ-specific cancer signature Contribution
  Esophagus_A 2948.114
  Esophagus_B 815.6483
  Esophagus_C 1278.381
  Esophagus_D 883.5358
  Esophagus_E 1446.103
  Esophagus_F 880.0416
  Esophagus_G 1262.907
  Esophagus_H 743.2682
  
  r2
  ..
  r15
  and
  Non_res1
  Organ-specific cancer signature Contribution
  Esophagus_A 2660.722
  Esophagus_B 1471.017
  Esophagus_C 1639.904
  Esophagus_D 0
  Esophagus_E 2580.775
  Esophagus_F 946.3675
  Esophagus_G 2013.654
  Esophagus_H 0
  
  ...
  Non_res33
  I want a unified file in column one is Organ-specific cancer and 48 more columns are the second column of each separate file
  How I can do that?
  
  user131: If the first column is always the same:
  
  R cbind in a loop
  bash paste file*.txt
  
  If the first columns in not same:
  
  R merge in a loop
  bash Merge multiple files by common field
  
  
original_text: 4595: <p>I have 48 files in which I have</p>
  
  <p>r1</p>
  
  <pre><code>Organ-specific cancer signature Contribution
  Esophagus_A 2948.114
  Esophagus_B 815.6483
  Esophagus_C 1278.381
  Esophagus_D 883.5358
  Esophagus_E 1446.103
  Esophagus_F 880.0416
  Esophagus_G 1262.907
  Esophagus_H 743.2682
  </code></pre>
  
  <p>r2
  ..
  r15</p>
  
  <p>and</p>
  
  <p>Non_res1</p>
  
  <pre><code>Organ-specific cancer signature Contribution
  Esophagus_A 2660.722
  Esophagus_B 1471.017
  Esophagus_C 1639.904
  Esophagus_D 0
  Esophagus_E 2580.775
  Esophagus_F 946.3675
  Esophagus_G 2013.654
  Esophagus_H 0
  </code></pre>
  
  <p>...</p>
  
  <p>Non_res33</p>
  
  <p>I want a unified file in column one is Organ-specific cancer and 48 more columns are the second column of each separate file</p>
  
  <p>How I can do that?</p>
   131: <p>If the first column is always the same:</p>
  
  <ul>
  <li><a href="https://stackoverflow.com/a/33073145/680068">R cbind in a loop</a></li>
  <li>bash <code>paste file*.txt</code></li>
  </ul>
  
  <p>If the first columns in not same:</p>
  
  <ul>
  <li><a href="https://stackoverflow.com/q/8091303/680068">R merge in a loop</a></li>
  <li><a href="https://stackoverflow.com/q/13710876/680068">bash Merge multiple files by common field</a></li>
  </ul>
  