binary - LIBSVM probability estimates -



binary - LIBSVM probability estimates -

i inquire if true probability estimates produced libsvm indicate distance separating plane ?

if have binary class, can smaller probability estimates of class 0 means higher possibility of belong class 1 compare bigger probability estimates of class 0 ?

thanks

first question:

if distance between separating hyperplane , vector large, can have high grade of confidence correctly classified, probability estimate high.

in contrary, if have vector close hyperplane separating 2 classes, probability estimate close 0.5 each class.

keep in mind probability estimate not distance. computed using distance.

second question:

indeed if have binary class, probability estimate spread between 2 classes.

the event "the vector belongs class 0" event "the vector belongs class 1" not

if vector in class 0, compute

and can compute probability of not

so if class 1 have 0.8 probability, class 0 have 0.2 probability.

binary classification svm probability libsvm

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