[Rd] history of objects() and ls()

[Peter Dalgaard]

As far as I remember, this comes from S-PLUS, introduced around v.3 (white book?) or maybe v.4, and due to a desire to cut some Unix ties as MS-DOS was taking over the world. However, it was long ago, in a different world, and besides, S-PLUS is dead (mostly).

- Peter 

> On 4 Jan 2019, at 00:45 , Ben Bolker <bbolker using gmail.com> wrote:
> 
> 
>  I found out today (maybe I had known sometime before??) that objects()
> is a synonym for ls().  I'm curious about the history, which seems to go
> at least back to the beginning of R.  It's been thus since SVN revision
> 2 (Sep 1997) ...
> 
> svn cat https://svn.r-project.org/R/trunk/src/library/base/R/attach@2 |
> grep objects
> 
>  I had a quick look at the Becker & Chambers brown book (1984) and
> Becker and Wilks blue book (1988) on Google books and could find ls but
> not objects() ... ?
> 
>  Anyone happen to know?
> 
> cheers
>   Ben Bolker
> 
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-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
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