title: Retrieving values from an rhandsontable object (R, R shiny)
body: <p>I use the (awesome) package rhandsontable that will later be included in an <strong>R</strong> shiny webpage. The user can click at some places, and I want to know how to retrieve the info on which rows was clicked. 
  Here is an example, (to be copy&amp;paste in an <strong>R</strong> terminal):</p>
  
  <pre><code>library(rhandsontable)
  
  ## Create the dataset
  min = c(1,seq(2,34,by=2))
  kmh = c(0,seq(7,23,by=1))
  mph = round( kmh / 1.609344, digits=0 )
  stop.speed = rep(FALSE, length(min))    
  DF = data.frame(min, kmh, mph, stop.speed, stringsAsFactors = FALSE)
  
  #plot the table
  r = rhandsontable(DF, useTypes = TRUE)
  </code></pre>
  
  <p>I thought about converting it to an <strong>R</strong> object:</p>
  
  <pre><code>hot_to_r(r)
  
  Error in (function (data, changes, params, ...)  : 
  argument "params" is missing, with no default
  </code></pre>