| Type: | Package |
| Title: | Refined Modified Stahel-Donoho Estimators for Outlier Detection |
| Version: | 0.1.1 |
| Suggests: | testthat (≥ 3.0.0) |
| Author: | Kazumi Wada  [aut,
cre] |
| Maintainer: | Kazumi Wada <kazwd2008@gmail.com> |
| Description: | A function for multivariate outlier detection named Modified Stahel-Donoho (MSD) estimators is contained. The function is for elliptically distributed datasets and recognizes outliers based on Mahalanobis distance. The function is called the single core version in Wada & Tsubaki (2013) <doi:10.1109/CLOUDCOM-ASIA.2013.86> and evaluated with other methods in Wada, Kawano & Tsubaki (2020) <doi:10.17713/ajs.v49i2.872>. |
| License: | GPL (≥ 3) |
| Encoding: | UTF-8 |
| Language: | en-US |
| RoxygenNote: | 7.3.2 |
| Config/testthat/edition: | 3 |
| NeedsCompilation: | no |
| Packaged: | 2025-10-20 00:40:07 UTC; wada |
| Repository: | CRAN |
| Date/Publication: | 2025-10-20 02:10:07 UTC |
Modified Stahel-Donoho Estimators (Single core version)
Description
This function is for multivariate outlier detection. Ver.1.6 2009/07/14 Published at http://www.stat.go.jp/training/2kenkyu/pdf/ihou/67/wada1.pdf (in Japanese) Ver.1.7 2018/10/19 Modify gso function to stop warning messages Ver.2 2021/09/10 Added the outlier detection step
Usage
RMSD(inp, nb = 0, sd = 0, pt = 0.999)
Arguments
inp |
input data (a numeric matrix) |
nb |
number of basis |
sd |
seed (for reproducibility) |
pt |
threshold for outlier detection (probability) |
Value
a list of the following information
u final mean vector
V final covariance matrix
wt final weights
mah squared Mahalanobis distance of each observation
FF F test statistics
cf threshold to detect outliers (percentile point)
ot outlier flag (1:normal observation, 2:outlier)