[R] as.integer(TRUE)

[Peter Dalgaard]

Tamas K Papp <tpapp at princeton.edu> writes:

> The fact that as.integer(TRUE) is 1 (and that for FALSE, it gives
> zero) is a really nice feature, eg when constructing piecewise
> functions (for example, as in -x*(x<0)+x*(x>=0)) and for many other
> things.
> 
> Since I haven't found a reference about this, I just wanted to ask
> whether this is officialy part of the language or just a side effect
> (ie I want to know whether it is here to stay and if it is prudent to
> use this).

I can't find it in the official docs either, but I'm pretty sure that
it is blue book material, and that noone intends to change it.

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
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