[R] problems with unique

[Ben Bolker]

n.vialma <at> libero.it <n.vialma <at> libero.it> writes:

> 
> Hi everyone,
> I have a question concerning the unique function. I'm using it with two 
> different data frame,which are similar in structure, but as in one case unique 
> works properly in the other doesn't work and I don't understand why.
> Someone knows why sometimes unique doesn't do things properly??
> Thanks for your attention

  I'm afraid this is a case of "we can't possibly answer that question
posed in that way".  Please (1) read the posting guide; (2) provide a
reproducible example; (3) tell us what "doesn't work/doesn't do things
properly" means ...