title: Barplot - two bars next to each other and barplots in separate windows
body: <p>I would  like to use the following data to create a visualization:</p>
  
  <pre><code>&gt; dput(data)
  structure(c(1264L, 2190L, 2601L, 1441L, 1129L, 2552L, 1820L, 306L, 
              1124L, 298L, 233L, 493L, 2316L, 461L, 294L, 238L, 15L, 89L, 152L, 
              163L, 116L, 60L, 80L, 31L, 27L, 41L, 33L, 58L, 55L, 89L, 7L, 
              7L, 13L, 23L, 54L), .Dim = c(7L, 5L), .Dimnames = list(c("Mark1", 
                                                                       "Mark2", "Greg1", "Greg2", "Tom1", "Tom2", "Martin"), c("1", "2", "3", "4", 
                                                                                                                    "5")))
  </code></pre>
  
  <p>I would like to visualize it in a manner somewhat similar to the barplots shown below:</p>
  
  <p><a href="https://i.stack.imgur.com/liZz2.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/liZz2.jpg" alt="Example"></a></p>
  
  <p>However, instead of stacking bars on top of each other, I would like to place the barplots to each other. In total there should be 4 windows. A window here refers to a set of two barplots (eg. for Mark1 and Mark2) or a single one in case of Martin.</p>
  
  <p>To make it clearer:</p>
  
  <p>Mark1 and Mark2 - should be in/on the same window</p>
  
  <p>Greg1 and Greg2 - as above</p>
  
  <p>Tom1 and Tom2 - as above</p>
  
  <p>Martin - window consisting of single barplot</p>