Current Slide
Small screen detected. You are viewing the mobile version of SlideWiki. If you wish to edit slides you will need to use a larger device.
Using IF-THEN Rules for Classification
- Represent the knowledge in the form of IF-THEN rules
- R: IF age = youth AND student = yes THEN buys_computer = yes
- Rule antecedent/precondition vs. rule consequent
- Assessment of a rule: coverage and accuracy
- ncovers = # of tuples covered by R
- ncorrect = # of tuples correctly classified by R
- coverage(R) = ncovers /|D| /* D: training data set */
- accuracy(R) = ncorrect / ncovers
- If more than one rule are triggered, need conflict resolution
- Size ordering: assign the highest priority to the triggering rules that has the “toughest” requirement (i.e., with the most attribute tests)
- Class-based ordering: decreasing order of prevalence or misclassification cost per class
- Rule-based ordering (decision list): rules are organized into one long priority list, according to some measure of rule quality or by experts
Speaker notes:
Content Tools
Tools
Sources (0)
Tags (0)
Comments (0)
History
Usage
Questions (0)
Playlists (0)
Quality
Sources
There are currently no sources for this slide.