R devel - May 2014 - precedence (was 'historical NA question')

Hadley asked about the Blue book; my shelf still has the earlier brown book
    Becker and Chambers, 1984, S: An interactive environment for data analysis
and graphics.

The manual page for precedence is

$               component select
%x              special operator
-               unary minus
:               sequence operator
^ **            exponentiation
* /             mult/div
+ -             add/sub
< > <= >= == != logical
!               not
& |             and/or
<- ->           assignment

Terry Therneau

On Wed, 7 May 2014, Therneau, Terry M., Ph.D. wrote:
> Hadley asked about the Blue book; my shelf still has the earlier brown book
>   Becker and Chambers, 1984, S: An interactive environment for data
analysis
> and graphics.
>
> The manual page for precedence is
>
> $               component select
> %x              special operator
> -               unary minus
> :               sequence operator
> ^ **            exponentiation
> * /             mult/div
> + -             add/sub
> < > <= >= == != logical
> !               not
> & |             and/or
> <- ->           assignment
>
which did lead to some head scratching after plotting exp(-x^2) :-)

luke
> Terry Therneau
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>
-- 
Luke Tierney
Chair, Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
Department of Statistics and        Fax:               319-335-3017
    Actuarial Science
241 Schaeffer Hall                  email:   luke-tierney at uiowa.edu
Iowa City, IA 52242                 WWW:  http://www.stat.uiowa.edu

On 5/7/14, 5:21 AM, Therneau, Terry M., Ph.D. wrote:
> Hadley asked about the Blue book; my shelf still has the earlier brown book
>     Becker and Chambers, 1984, S: An interactive environment for data
> analysis and graphics.
Historically interesting, but there was never a guarantee that Version 3 
of S (the "blue book") was back-compatible with earlier versions.  We 
gave users some help in "getting on the road" to converting, that was 
all (see Appendix 4 to the blue book).

For that one brief moment, we felt free to innovate.

John
>
> The manual page for precedence is
>
> $               component select
> %x              special operator
> -               unary minus
> :               sequence operator
> ^ **            exponentiation
> * /             mult/div
> + -             add/sub
> < > <= >= == != logical
> !               not
> & |             and/or
> <- ->           assignment
>
> Terry Therneau
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel