2
votes
1answer
683 views

Kappa statistic in plain English?

I'm reading a data mining book and it mentioned the Kappa statistic as a mean for evaluating the predication performance of classifiers. However I just can't understand this. I also checked wikipedia ...
1
vote
3answers
79 views

Is this classifier random?

I trained a classifier and got the following stats on some test data: ...
1
vote
0answers
49 views

When should I prefer kappa over accuracy for binary classification problems?

I'm using the caret package in R that provides two kind of metrics for classification problems - accuracy and kappa. When should ...