Can't use rPlot for anything.

[Larry-mor]

Just like topic, every time I try to use rPlot, this will show:
Error in UseMethod("rPlot") :
no applicable method for 'rPlot' applied to an object of class "formula"
What can I do about it?
eg.

demo(polycharts)


	demo(polycharts)
	---- ~~~~~~~~~~

Type  <Return>	 to start : 

> ..p. <- function() invisible(readline("\nPress <return> to continue: "))

> library(rCharts)

> ## Example 1 Facetted Scatterplot
> names(iris) = gsub("\\.", "", names(iris))

> p1 <- rPlot(SepalLength ~ SepalWidth | Species, data = iris, color = 'Species', type = 'point')
Error in UseMethod("rPlot") : 
  no applicable method for 'rPlot' applied to an object of class "formula"