Re: [R] Take a levels

From: Sean Davis <sdavis2_at_mail.nih.gov>
Date: Wed 27 Apr 2005 - 22:32:00 EST

On Apr 27, 2005, at 8:21 AM, Muhammad Subianto wrote:

> Dear all,
> How can I take a levels from a dataset.
> For example,
>
> data(iris)
> x.iris <- iris[,1:4]
> y.iris <- iris[,5]
>> y.iris
> [1] setosa setosa setosa setosa setosa setosa
> [7] setosa setosa setosa setosa setosa setosa
> ....
> [139] virginica virginica virginica virginica virginica virginica
> [145] virginica virginica virginica virginica virginica virginica
> Levels: setosa versicolor virginica
>
> I want like,
> y.iris level are,
> [] setosa versicolor virginica
>

Muhammad,

See ?unique and ?factor.

Sean



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