Iris Plants Database1 is perhaps the best-known database to be found in the pattern recognition literature. The data set contains three species of flowers (classes) setosa, versicolour and virginica. It contains 3 classes of 50 instances each, where each class refers to a type of iris plant. One class (setosa) is linearly separable from the other 2; the latter are NOT linearly separable from each other. The database contains the following attributes in cm: petal width, petal length, sepal width, and sepal length.