title: How many columns can be selected in a data frame in R?
body: <p>I want to select 3117 columns out of a data frame,
  I tried to select them by column names:</p>
  
  <pre><code>dataframe %&gt;% 
    select(
      'AAACCTGAGCACGCCT-1',
      'AAACCTGAGCGCTTAT-1',
      'AAACCTGAGCGTTGCC-1',
      ......,
      'TTGGAACCACGGACAA-1'
    )
  </code></pre>
  
  <p>or</p>
  
  <pre><code>firstpickupnames &lt;- ('AAACCTGAGCACGCCT-1','AAACCTGAGCGCTTAT-1','AAACCTGAGCGTTGCC-1',......,'TTGGAACCACGGACAA-1')
  </code></pre>
  
  <p>Both ways the R console just replied </p>
  
  <pre><code>'AAACCTGAGCACGCCT-1','AAACCTGAGCGCTTAT-1','AAACCTGAGCGTTGCC-
  1',......,'TTGGAACCACGGACAA-1'
  + )
  +
  </code></pre>
  
  <p>What does this mean? Is there a limitation of columns that I can select in R?</p>