hi,
how do the parameter setting for class weights in LibSVM work? e.g. if I have a class that is 2x less or 3xless than my main class, can I simply weight them 2x, or 3x respectively?
is it simply that what is meant?? or how does it work? I remember that in the MetaCost operator, the meaning of the weights is somewhat different if I'm correct...
Hi,
Yes the Class Weights parameter allows you to manually adjust the class weights. You could set "Yes" = 1 and "No" = 2. The Metacost operator, if memory serves, uses a cost matrix where you can adjust the penalty of mis-classification. Like Predicted True vs Acutal True = 1 and Predicted True vs Actual False = 4.