[R] number of distinct values in a dataframe

[Thomas Lumley]

On Mon, 22 Sep 2003, Douglas Bates wrote:

> Rado Bonk <rbonk at host.sk> writes:
>
> > How can I found the number of a distinct values in a data frame
> > (occurrence of distinct values)? The dataframe consists of several
> > thousands integer numbers.
>
> It is not clear if you are asking about the number of unique values in
> a column in a data frame or the number of unique rows in a data frame.
> If there is more than one column these answers could be different.
>
> The first is question is the easier one. Just use
>
>  length(unique(mydataframe$columnOfInterest))
>

The same works for the second question

	length(unique(mydataframe))


	-thomas