Develop a k-nearest neighbor (kNN)

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Iris.xlsx
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Iris

sepal length sepal width petal length petal width Class
6.8 3 5.5 2.1 Iris-virginica
5.4 3 4.5 1.5 Iris-versicolor
5.6 3 4.1 1.3 Iris-versicolor Training Set Row 2:22 Attribute Information:
5.1 3.8 1.9 0.4 Iris-setosa Testing Set Row 23:28
6.7 2.5 5.8 1.8 Iris-virginica 1. sepal length in cm
5.1 3.7 1.5 0.4 Iris-setosa 2. sepal width in cm
6.3 2.3 4.4 1.3 Iris-versicolor 3. petal length in cm
6.1 2.8 4 1.3 Iris-versicolor 4. petal width in cm
6.4 2.7 5.3 1.9 Iris-virginica 5. class:
5 3.5 1.3 0.3 Iris-setosa Iris-versicolor
6.3 2.9 5.6 1.8 Iris-virginica Iris-virginica
6.3 3.3 6 2.5 Iris-virginica Iris-setosa
7.2 3.6 6.1 2.5 Iris-virginica
5.4 3.4 1.7 0.2 Iris-setosa
4.5 2.3 1.3 0.3 Iris-setosa
4.6 3.6 1 0.2 Iris-setosa
5 3.5 1.6 0.6 Iris-setosa
6.7 3.1 4.7 1.5 Iris-versicolor
5.7 3.8 1.7 0.3 Iris-setosa
6.5 3.2 5.1 2 Iris-virginica
5.8 2.7 3.9 1.2 Iris-versicolor
7.3 2.9 6.3 1.8 Iris-virginica
5.9 3.2 4.8 1.8 Iris-versicolor
6.1 2.8 4.7 1.2 Iris-versicolor
5.1 3.3 1.7 0.5 Iris-setosa
4.9 2.5 4.5 1.7 Iris-virginica
6.4 2.9 4.3 1.3 Iris-versicolor