oliveOils_4perPage

# oliveOils_4perPage - Outline Introduction to Classication...

This preview shows pages 1–3. Sign up to view the full content.

Introduction to Classifcation Data Mining Prof. Dawn Woodard School of ORIE Cornell University 1 Outline 1 Announcements 2 Big-O Notation 3 Heart Disease Detection 2 Announcements Don’t forget to sign up for Blackboard and get a departmental account 4 Big-O Notation The order of an algorithm, e.g. O ( N 2 P ) , controls the efFciency as N and P get very large. This is because asymptotically the highest-order term dominates If algorithm A has order N 2 P and algorithm B has order N 3 P then as N grows algorithm B becomes much slower than algorithm A ±or N large enough, B is arbitrarily slower than A. ±or instance, there is some N such that for all N > N , B is 10 times slower than A. There is some N ∗∗ such that for all N > N ∗∗ ,Bis100 times slower than A, etc. 6

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Heart Disease Detection Can patients be effectively screened for the presence of heart disease (CAD) without the use of angiography? Angiography is an invasive and expensive procedure where a tube is inserted into the artery of concern. Rather than using angiography on all patients to detect CAD, it is better to use it on high-risk patients. 8 Heart Disease Detection 9 Heart Disease Detection The authors use data from the Cleveland Clinic. The data has non-invasive clinical test results as well as angiography results (CAD / no CAD) for 303 patients. They learn a classiFcation rule for predicting CAD based on the non-invasive test results. This classiFcation rule uses a model-based approach (logistic regression). They check the predictive accuracy of their classiFcation rule on data from patients in Hungary (74 % ) and California (77 % ).
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 12/23/2009 for the course ORIE 4740 at Cornell.

### Page1 / 8

oliveOils_4perPage - Outline Introduction to Classication...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online