[R] help with $ and % symbols in R

[David Winsemius]

On Sep 18, 2009, at 5:24 PM, Edward Chen wrote:

> Could someone explain to me briefly and point me to where I can find  
> help on
> what the symbols $ and % mean in R? I have seen them in many others'  
> codes,
> but I am still very unsure as to what they mean and what they do.
> Thank you very much!

For "$" you can just try:

?"$"   # ... and get information on the extraction operators.

For "%", it is not an operator itself but "%%" is; as is "%in%"; as  
are other infix operators, and help pages for them can be brought up  
in a similar fashion.

?"%%"
?"%in%"

-- 

David Winsemius, MD
Heritage Laboratories
West Hartford, CT