title: plotting a histogram with rCharts?
body: <p>I'm trying to create a histogram with rCharts. This is my code:</p>
  
  <pre><code>Age &lt;- structure(list(AGE_FBS001_002 = structure(1:58, .Label = c("14", 
  "16", "17", "18", "19", "20", "21", "22", "23", "24", "25", "26", 
  "27", "28", "29", "30", "31", "32", "33", "34", "35", "36", "37", 
  "38", "39", "40", "41", "42", "43", "44", "45", "46", "47", "48", 
  "49", "50", "51", "52", "53", "54", "55", "56", "57", "58", "59", 
  "60", "61", "62", "63", "64", "65", "66", "67", "68", "69", "70", 
  "71", "76"), class = "factor"), Freq = c(1L, 4L, 8L, 19L, 35L, 
  38L, 65L, 103L, 124L, 128L, 125L, 128L, 135L, 102L, 74L, 117L, 
  80L, 68L, 76L, 68L, 70L, 47L, 48L, 42L, 52L, 53L, 34L, 42L, 42L, 
  41L, 33L, 24L, 19L, 23L, 29L, 23L, 24L, 25L, 28L, 22L, 18L, 18L, 
  13L, 10L, 8L, 3L, 6L, 8L, 5L, 8L, 1L, 1L, 2L, 2L, 1L, 4L, 2L, 
  1L)), .Names = c("AGE_FBS001_002", "Freq"), row.names = c(NA, 
  -58L), class = "data.frame")
  
  rp1 &lt;- rPlot(x="bin(AGE_FBS001_002,10", y="Freq", data=data, type="bar")
  rp1$params$width &lt;- 700
  rp1$params$height &lt;- 500
  rp1$xAxis(axisLabel = "Age")
  rp1$yAxis(axisLabel = "Count", width = 50)
  </code></pre>
  
  <p>I get this error: "‘xAxis’ is not a valid field or method name for reference class “Polycharts”"</p>
  
  <p>How can I fix it?</p>