Use of abbreviations

Wed, Mar 21, 2001 9:19 PM #

Hi there,

Here is my situation:

NEWBIE!!!!!

_              
platform i386-pc-mingw32
arch     x86            
os       Win32          
system   x86, Win32     
status                  
major    1              
minor    2.2            
year     2001           
month    02             
day      26             
language R             

I wonder why.

Given this data set

[1] "id"   "run"  "trap" "spp"  "no"  

I can use 'n' as an abbreviation for 'no'

[1] 18087

but below I cannot

Error in sum(n) : Object "n" not found

Error: syntax error


Am I missing something from the manual?

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Brian Ripley

Wed, Mar 21, 2001 11:02 PM #

On Thu, 22 Mar 2001, Robert Cunningham wrote:

[I suggest that you resist this...see below.]

Names of components are partially matched when accessed by $, or [[ ]].
After attaching a list, the general search mechanism is used, and symbols
are not partially matched.

Beware that using partial matching is regrarded as bad practice, as
changing the list (e.g. adding to it) can break code which relies on this.

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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