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 ##### ?のヘルプ
> ?`?`

Question package:utils R Documentation

Documentation Shortcuts

Description:

These functions provide access to documentation. Documentation on
a topic with name ‘name’ (typically, an R object or a data set)
can be displayed by either ‘help("name")’ or ‘?name’...

 ##### たとえば パッケージそのもののヘルプを見る
> library(lattice)
> package?lattice # `?` (package, lattice)

A_01_Lattice package:lattice R Documentation

Lattice Graphics

Description:

The ‘lattice’ add-on package is an implementation of Trellis
graphics for R. It is a powerful and elegant high-level data
visualization system with an emphasis on multivariate data. It is
designed to meet most typical graphics needs with minimal tuning,
but can also be easily extended to handle most nonstandard
requirements.

Details:

Trellis Graphics, originally developed for S and S-PLUS at ...

 ##### パッケージの提供する関数などの情報は
 > library (help = lattice)

パッケージ '‘lattice’' の情報

記述：

Package: lattice
Version: 0.20-6
Date: 2012/03/10
Priority: recommended
Title: Lattice Graphics
...

索引：

Lattice Lattice Graphics
Rows Extract rows from a list
axis.default Default axis annotation utilities
...

という訳で，いつもお世話になっております＞ ?
（記事，なげぇよ．．．）