[R] unique deletes names - intended?

[Heinz Tuechler]

Dear All,

as shown in the example, unique() deletes names of vector elements. 
Is this intended?
Of course, one can use indexing by !duplicated() instead.

Greetings,
Heinz

## unique deletes names
v1 <- c(a=1, b=2, c=3, e=2, a=4)
unique(v1) # names deleted

v1[!duplicated(v1)] # names preserved


platform       i386-pc-mingw32                          
arch           i386                                     
os             mingw32                                  
system         i386, mingw32                            
status         Patched                                  
major          2                                        
minor          3.1                                      
year           2006                                     
month          07                                       
day            01                                       
svn rev        38471                                    
language       R                                        
version.string Version 2.3.1 Patched (2006-07-01 r38471)