title: rHighcharts hide/unhide not working in shiny
body: <p>As an independent code the hide/unhide is working, but not in shiny</p>
  
  <p>I have a data frame df as below</p>
  
  <pre><code>Date       Category     Number
  2014-01-01   AA            2
  2014-01-01   BB            4
  2014-01-01   CC            3
  2014-01-01   DD            11
  2014-01-02   AA            21
  2014-01-02   BB            14
  2014-01-02   CC            12
  2014-01-02   DD            14
  2014-01-03   AA            11
  2014-01-03   BB            13
  2014-01-03   CC            9
  2014-01-03   DD            11
  </code></pre>
  
  <p>I am trying to plot stacked bar plot with hide/unhide option. I tried to use the below example hide/unhide is not working. If I hide the data that is in the middle, it is not rescaling.
  <a href="http://glimmer.rstudio.com/reinholdsson/rHighcharts/" rel="nofollow">http://glimmer.rstudio.com/reinholdsson/rHighcharts/</a></p>
  
  <p>I also tried below example, but it is confusing and not showing any plot at all.
  <a href="http://rcharts.io/viewer/?5842467#.UuuYLKX-aQw" rel="nofollow">http://rcharts.io/viewer/?5842467#.UuuYLKX-aQw</a></p>
  
  <p>My code is</p>
  
  <pre><code>b &lt;- rCharts:::Highcharts$new()
  b$chart(type = "column")
  b$plotOptions(column = list(stacking = "normal"))
  b$xAxis(categories = unique(as.character(df$Date)))
  tt = sapply(unique(as.character(df$Category)), function(name){
     d &lt;- df[df$Category == name, ]
     b$series(name = name, data = d$Number, stack = d$Category[[1]])
  })
  b
  </code></pre>
  
  <p>with the above code the stacking option is gone.</p>