[R] test whether all elements of a vector are identical

[Jannis]

Dear list,


this might be an easy one, but I could figure out a solution (or how to 
google the right term).

Is there any way to test whether all elements of a vector are identical?

For numeric vectors I would use

sum(diff(vector)==0)==0

but I have character vectors. Any Ideas?

Cheers
Jannis