[Rd] precedence (was 'historical NA question')

[luke-tierney at uiowa.edu]

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
>
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-- 
Luke Tierney
Chair, Statistics and Actuarial Science
Ralph E. Wareham Professor of Mathematical Sciences
University of Iowa                  Phone:             319-335-3386
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