Explicitly draw plot (ggtern and ggplot2 compatible)

Makes sure both ggtern and ggplot2 objects display correctly with the print.ggplot function.

# S3 method for ggplot
print(x, newpage = is.null(vp), vp = NULL, ...)

Arguments

x	plot to display
newpage	draw new (empty) page first?
vp	viewport to draw plot in
...	other arguments not used by this method

Value

Invisibly returns the result of ggplot_build(), which is a list with components that contain the plot itself, the data, information about the scales, panels etc.