[R] Unique subsetting question

[Ista Zahn]

Hi Andrew,
Perhaps you did not notice my previous email. The answer is still the
same (see below):

On Wed, Sep 22, 2010 at 1:48 PM, AndrewPage <savejarvis at yahoo.com> wrote:
>
> How about this:
>
>
> s = c("aa", "bb", "cc", "", "aa", "dd", "", "aa")
>
> n = c(2, 3, 5, 6, 7, 8, 9, 3)
>
> b = c(TRUE, FALSE, TRUE, TRUE, FALSE, TRUE, TRUE, FALSE)
>
> df = data.frame(n, s, b)       # df is a data frame
>
>
> I want to display df with no value in s occurring more than once.

df <- df[!duplicated(df$s),]

Also, I
> want to delete the rows where s contains "".

Same idea here:
df[s != "",]

-Ista

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-- 
Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org