[R] multiclass SVM (e1071 package): number of estimated models

[john.gelburg]

Hi,

I run multiclass SVM for iris data, which contains 3 classes (manual page
52). Based on manual, the implementation uses one-against-one approach:
k*(k-1)/2 binary classifiers trained. However, I am getting only two models
instead of three (only two columns of support vectors and coefficients).
What do I miss?

Thanks a lot for help,
John

Bellow is the code.

package(e1071)
data(iris)
x <- subset(iris, select = -Species)
y <- Species
model <- svm(x, y)
model$SV
model$coefs
-- 
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