code: private double loglikelihoodAnomalous(DBIDs anomalousObjs) {
      return anomalousObjs.isEmpty() ? 0 : anomalousObjs.size() * -FastMath.log(anomalousObjs.size());
    }
docs: Loglikelihood anomalous objects. Uniform distribution.
  
  @param anomalousObjs
  @return loglikelihood for anomalous objects