gvisBubbleChart(data, idvar = "", xvar = "", yvar = "", colorvar = "",
sizevar = "", options = list(), chartid)data.frame to be displayed as
a bubble chart. The data has to have at least three
columns for idvar, xvar, and yvar.data with the bubbledata to be plotted on the x-axis.data to be plotted on the y-axis.series<sizeAxis option.