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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