what is unit area under a curve used for why a ROC curve is insensitive to class distributions what is the auc for a classifier which classfier use an area under ac curve? what is the auc for a classifier what is auc in class what is the auc of a multiple class classifier? what is the auc curve for multi-class what is the area under roc curve for a simple classifier? what is multiclass auc what is a class based arc curve which classifier is best for a class-skewed class distribution? what's the area under a roc curve what is a auc curve what is the auc for multiple classes what is a acr curve for multiple classes which type of classifier is a classifier in a ROC curve? what is the area under curve of a classifier for multiple classes which classification problem requires an area under roc curve? ac curve definition