title: Data Table Format Row by Row Number
body: <p>I feel this is a basic question, but no matter how much I searched, I can't seem to find a straightforward answer:</p>
  
  <p>I am trying to format all numeric columns of row 3 of my data table as percent, and in addition make the cells grey. 
  Formatting columns is quite easy and and I've found a few different options that format rows based on a conditions from a column, but not a straight forward way to just select a row I wish to format.</p>
  
  <p>My code is a bit messy, and does a lot of stuff, so I'll just use the iris dataset as an example. </p>
  
  <p>How would I format just row 3 of the data table (set numbers in all columns to % and make the background grey)?</p>
  
  <pre><code>server.R:
  
  library(shiny)
  library(DT)
  shinyServer(function(input, output) {
    df&lt;-datatable(iris, options = list(pageLength = 5))
    output$iris &lt;- renderDataTable(df)
  })
  
  
  ui.R:
  
  library(shiny)
  shinyUI(fluidPage(
    titlePanel("Iris Data"),
    dataTableOutput("iris") 
  )
  )
  </code></pre>