metadata retrieved from object object
is
paased to ggplot2::ggtitle()
as arguments for title
,
subtitle
and caption
. The specification for the title is
passed as argument to annotations
, and consists in the keyword
title
with optional modifiers selecting the kind of metatdata to
use, separated by colons. Up to three keywords separated by colons are
accepted, and correspond to title, subtitle and caption. The recognized
keywords are: "objt"
, "class"
, "what"
, "when"
,
"where"
, "how"
, "inst.name"
, "inst.sn"
,
"comment"
and "none"
are recognized as modifiers to
"title"
; "none"
is a placeholder. Default is
"title:objt"
or no title depending on the context.