gg_dep(version, msg)
Version numbers have the format version
, which is the most recent version before the
function (or other object) was deprecated.
gg_dep
will give an error, warning, or message, depending on the
difference between the current ggplot2 version and the specified
version
.
If the current major number is greater than version
's major number,
or if the current minor number is more than 1 greater than version
's
minor number, give an error.
If the current minor number differs from version
's minor number by
one, give a warning.
If the current subminor number differs from version
's subminor
number, print a message.