title: Control the height in fluidRow in R shiny
body: <p>I am trying to build a layout for a <code>shiny</code> app. I have been looking at the application <a href="http://shiny.rstudio.com/articles/layout-guide.html" rel="noreferrer">layout guide</a> and did some google search but it seems the layout system in shiny has its limits.</p>
  
  <p>You can create something like this:</p>
  
  <pre><code>fluidPage(
   fluidRow(
    column(6,"Topleft"),
    column(6,"Topright")),
   fluidRow(
    column(6,"Bottomleft"),
    column(6,"Bottomright"))
  )
  </code></pre>
  
  <p>This gives you 4 same sized objects.</p>
  
  <p>Is it possible now to give the 2 <code>Top-Objects</code> a different height as the <code>Bottom-Objects</code>? </p>
  
  <p>And is it possible to merge the <code>Topright-Object</code> and the <code>Bottomright-Object</code>?</p>