BREAST

699 objects with 9 features in 2 classes

        X = BREAST;

Breast cancer Wisconsin dataset obtained from the University of Wisconsin  Hospitals, Madison from Dr. William H. Wolberg.

Reference(s)

O. L. Mangasarian and W. H. Wolberg: "Cancer diagnosis via linear programming", SIAM News, Volume 23, Number 5, September 1990, pp 1 & 18.

        X = BREAST(VAL);

Per default the missing values are replaced by -1. When you want to  do something else, use one of the options in missingvalues.m.