title: How to sort all dataframes in a list of dataframes on the same column?
body: <p>I have a list of dataframes <code>dataframes_list</code>. For an example, I put the <code>dput(dataframes_list)</code> at the bottom. I want to sort all dataframes in the list on the column <code>enrichment</code>. I can sort one dataframe with </p>
  
  <pre><code>first_dataframe &lt;- dataframes_list[[1]]
  sorted_dataframe &lt;- first_dataframe[order(first_dataframe$enrichment),] 
  </code></pre>
  
  <p>How can I do this for every dataframe in <code>dataframes_list</code>?</p>
  
  <p>example <code>dataframes_list</code>:</p>
  
  <pre><code>list(structure(list(rank = c(1, 2, 3, 4, 5, 6), cmap.name = c("meclocycline", 
  "pimozide", "isocorydine", "alvespimycin", "15-delta prostaglandin J2", 
  "naloxone"), mean = c(-0.471, 0.504, -0.49, 0.193, 0.296, -0.383
  ), n = c(4, 4, 4, 12, 15, 6), enrichment = c(-0.869, 0.855, -0.859, 
  0.539, 0.476, -0.694), p = c("0.00058", "0.00058", "0.00068", 
  "0.00072", "0.00122", "0.00199"), specificity = c("0", "0.0302", 
  "0", "0.069", "0.2961", "0.0155"), percent.non.null = c(100, 
  100, 100, 50, 60, 83), signature_name = c("day1_day3__sham3_strict", 
  "day1_day3__sham3_strict", "day1_day3__sham3_strict", "day1_day3__sham3_strict", 
  "day1_day3__sham3_strict", "day1_day3__sham3_strict")), .Names = c("rank", 
  "cmap.name", "mean", "n", "enrichment", "p", "specificity", "percent.non.null", 
  "signature_name"), row.names = c(NA, 6L), class = "data.frame"), 
      structure(list(rank = c(1, 2, 3, 4, 5, 6), cmap.name = c("trichostatin A", 
      "daunorubicin", "ketotifen", "quipazine", "minoxidil", "ricinine"
      ), mean = c(-0.319, -0.515, 0.486, 0.476, 0.316, -0.481), 
          n = c(182, 4, 4, 4, 5, 4), enrichment = c(-0.384, -0.883, 
          0.862, 0.861, 0.812, -0.816), p = c("0", "0.00046", "0.0005", 
          "0.0005", "0.00058", "0.00209"), specificity = c("0.3762", 
          "0.0175", "0.0053", "0.0065", "0", "0.006"), percent.non.null = c(56, 
          100, 100, 100, 60, 100), signature_name = c("hour4_day1_day3__sham3_strict", 
          "hour4_day1_day3__sham3_strict", "hour4_day1_day3__sham3_strict", 
          "hour4_day1_day3__sham3_strict", "hour4_day1_day3__sham3_strict", 
          "hour4_day1_day3__sham3_strict")), .Names = c("rank", 
      "cmap.name", "mean", "n", "enrichment", "p", "specificity", 
      "percent.non.null", "signature_name"), row.names = c(NA, 
      6L), class = "data.frame"))
  </code></pre>