This data set describes nuclear characteristics for breast cancer diagnosis. Again, we consider examples of benign cancer as inliers and malignant cancer as outliers. In the preprocessing, we follow Zhang et al. , downsampling the outliers to 10. The processed database has 30 numeric attributes and 367 instances, namely 10 outliers (2.72%) and 357 inliers (97.28%).
 K. Zhang, M. Hutter, and H. Jin. A new local distance-based outlier detection approach for scattered real-world data. In Proc. PAKDD, pages 813-822, 2009.