Description Usage Arguments Details Author(s) References Examples
We provide an R implementation of the Local Correlation Integral method for detecting outliers as developed by Breunig, et al. (2000), and we follow its description given in Papadimitriou, et al. (2002).
1 |
data |
Any R data.frame which consists of numeric values only |
alpha |
a number in the unit interval for the fractional circle search |
A simple implementation is provided here. The core function is the distance function. For each observation, a search is made for nearest neighbors within r distance of it, and then for each of these neighbors, we find the number of observations in the fractional circle. Calculations based on multi-granularity deviation factor, MDEF, help in determining the outlier.
Siddharth Jain and Prabhanjan Tattar
M.M. Breunig, H.P. Kriegel, R.T. Ng, and J. Sander. Lof: Identifying density-based local outliers. In Proc. SIGMOD Conf., pages 93-104, 2000. Papadimitriou, S., Kitagawa, H., Gibbons, P.B. and Faloutsos, C., 2003, March. Loci: Fast outlier detection using the local correlation integral. In Data Engineering, 2003. Proceedings. 19th International Conference on (pp. 315-326). IEEE.
1 2 3 |
[1] "Normal" "Outlier" "Normal" "Normal" "Normal" "Normal" "Normal"
[8] "Normal" "Outlier" "Normal" "Normal" "Normal" "Normal" "Normal"
[15] "Normal" "Outlier" "Normal" "Normal" "Normal" "Normal" "Outlier"
[22] "Normal" "Normal" "Normal" "Normal" "Normal" "Normal" "Normal"
[29] "Outlier" "Normal"
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