Create aes()thetics from formula for ggplot2

This function allows to use a formula interface directly with ggplot2, or chart.

f_aes(formula, ..., with.facets = FALSE)

Arguments

formula: A formula.
...: Further aesthetics to set (like size, colour, etc.)
with.facets: Do we create special (non-ggplot2) aesthetics for facets (no by default)?

An aesthetic object of class uneval, as those obtained with aes().

# TODO...