Sepal Length=4,8
Sepal Width=3,1
Petal Length=1,6
Petal Length=0,2
(data dari row5 data.trn)
P(Ci)= P(class=”Iris_setosa”)= 25/75= 0,333
P(class=”Iris_versicolor”)= 25/75= 0,333
P(class=”Iris_virginica”)= 25/75= 0,333
(25 berasal dari jumlah class iris_setosa; 75 berasal dari jumlah seluruh class)
Compute P(X|Ci) for each class
P(Sepal length=4,8|class=iris_setosa)= 2/25 =0,08
P(Sepal length=4,8|class=iris_versicolor)= 0/25 =0
P(Sepal length=4,8|class=iris_virginica)= 0/25 =0
P(Sepal width=3,1|class=iris_setosa)= 2/25 =0,08
P(Sepal width =3,1|class=iris_ versicolor)= 1/25 =0,04
P(Sepal width =3,1|class=iris_ virginica)= 4/25 =0,16
P(Petal length=1,6|class=iris_setosa)= 6/25 =0,24
P(Petal length=1,6|class=iris_ versicolor)= 0/25 =0
P(Petal length=1,6|class=iris_ virginica)= 0/25 =0
P(Petal length=0,2|class=iris_setosa)= 16/25 =0,64
P(Petal length=0,2|class=iris_ versicolor)= 0/25 =0
P(Petal length=0,2|class=iris_ virginica )= 0/25 =0
P(X|Ci)=P(X|class=iris_setosa)
=0,08 x 0,08 x 0,24 x 0,64 =0,00098304
P(X|Ci)=P(X|class=iris_versicolor)
=0 x 0,04 x 0 x 0 =0
P(X|Ci)=P(X|class=iris_virginica)
=0 x 0,16 x 0 x 0 =0
P(X|Ci)*P(Ci)=P(X|class=iris_setosa)*P(class=iris_setosa)
=0,00098304 x 0,333 = 0,0003273523
P(X|Ci)*P(Ci)=P(X|class=iris_versicolor)*P(class=iris_versicolor)
=0 x 0,333 = 0
P(X|Ci)*P(Ci)=P(X|class=iris_virginica)*P(class=iris_virginica)
=0 x 0,333 = 0
Sehingga, X belongs to class=(class=”iris_setosa”)
