title: Is there a way to make a kable without lines/borders for pdf?
body: <p>I'm working on a shiny-app that produces and sends a pdf-report, containing the wrangled data. The problem is that I can't get the table layout to look as the client want it to look.</p>
  
  <p>The client wants the tables to lack lines/borders except ontop of the last row, is this possible in kable and/or kableExtra? No answers containing other packages please, as I'm aware that of xtable.</p>
  
  <pre><code>table.tbl &lt;- tibble(var1 = c("entry 1", "entry 2", "entry 3", "entry 4"),
                  var2 = c(2000, 1000, 3000, 200),
                  var3 = c(3000, 2000, 4000, 100))
  
  table.tbl %&gt;% 
    kable("latex", 
          booktabs = T) %&gt;% 
    row_spec((table.tbl %&gt;% 
               nrow()-1), hline_after = T)
  </code></pre>