Distance & Density-Based Outlier Detection
Natural Neighbor (NAN) algorithm to return the self-adaptive neighborh...
Connectivity-based Outlier Factor (COF) algorithm
Distance-based outlier detection based on user-given neighborhood size
Influenced Outlierness (INFLO) algorithm
Kernel Density Estimation Outlier Score (KDEOS) algorithm with gaussia...
Aggregated k-nearest neighbors distance over different k's
In-degree for observations in a k-nearest neighbors graph
Sum of distance to k-nearest neighbors
Local Density Factor (LDF) algorithm with gaussian kernel
Local Distance-based Outlier Factor (LDOF) algorithm
Local Correlation Integral (LOCI) algorithm with constant nearest neig...
Local Outlier Factor (LOF) algorithm
Local Outlier Probability (LOOP) algorithm
Natural Outlier Factor (NOF) algorithm
Relative Density-based Outlier Factor (RDOS) algorithm with gaussian k...
Robust Kernel-based Outlier Factor (RKOF) algorithm with gaussian kern...
Outlier detection in multidimensional domains. Implementation of notable distance and density-based outlier algorithms. Allows users to identify local outliers by comparing observations to their nearest neighbors, reverse nearest neighbors, shared neighbors or natural neighbors. For distance-based approaches, see Knorr, M., & Ng, R. T. (1997) <doi:10.1145/782010.782021>, Angiulli, F., & Pizzuti, C. (2002) <doi:10.1007/3-540-45681-3_2>, Hautamaki, V., & Ismo, K. (2004) <doi:10.1109/ICPR.2004.1334558> and Zhang, K., Hutter, M. & Jin, H. (2009) <doi:10.1007/978-3-642-01307-2_84>. For density-based approaches, see Tang, J., Chen, Z., Fu, A. W. C., & Cheung, D. W. (2002) <doi:10.1007/3-540-47887-6_53>, Jin, W., Tung, A. K. H., Han, J., & Wang, W. (2006) <doi:10.1007/11731139_68>, Schubert, E., Zimek, A. & Kriegel, H-P. (2014) <doi:10.1137/1.9781611973440.63>, Latecki, L., Lazarevic, A. & Prokrajac, D. (2007) <doi:10.1007/978-3-540-73499-4_6>, Papadimitriou, S., Gibbons, P. B., & Faloutsos, C. (2003) <doi:10.1109/ICDE.2003.1260802>, Breunig, M. M., Kriegel, H.-P., Ng, R. T., & Sander, J. (2000) <doi:10.1145/342009.335388>, Kriegel, H.-P., Kröger, P., Schubert, E., & Zimek, A. (2009) <doi:10.1145/1645953.1646195>, Zhu, Q., Feng, Ji. & Huang, J. (2016) <doi:10.1016/j.patrec.2016.05.007>, Huang, J., Zhu, Q., Yang, L. & Feng, J. (2015) <doi:10.1016/j.knosys.2015.10.014>, Tang, B. & Haibo, He. (2017) <doi:10.1016/j.neucom.2017.02.039> and Gao, J., Hu, W., Zhang, X. & Wu, Ou. (2011) <doi:10.1007/978-3-642-20847-8_23>.