Description Usage Arguments Details Value Author(s) References Examples
The function determines a robust subsample utilizing the Delaunay triangulation.
1 |
data |
At least a two-dimensional data matrix is required. Number of observations needs to be greater than the number of dimensions. No degenerated (i.e. collinear) data sets allowed. |
N |
Size of the identified subsample. Default is |
rew |
Logical. Specifies whether reweighting should be conducted (TRUE) or not (FALSE). Default is TRUE. |
The function first calls the delaunayn
function within the geometry-package. The results are subsequently used to determine a robust subsample.
data |
The input data set. |
tri |
Vertices of all simplices of the Delaunay triangulation. Each row represents a simplex. |
neigh |
Lists for every simplex the adjacent/neighboring simplices. Each list entry represents a simplex. |
radii |
Circum-(hypersphere-)radius of each simplex. |
center |
Center coordinates of all simplices. |
LiB |
List of all basins found. Index of simplices. Smallest subsample of size |
LiN |
List of all neighboring simplices per basin. Index of simplices. Smallest subsample of size |
GeB |
Number of associated data points per basin. Smallest subsample of size |
drin |
(Initial) Robust subsample of size N. |
raw.mean |
Mean estimate based on (initial) robust subsample of size N. |
raw.cov |
Covariance estimate based on (initial) robust subsample of size N. |
final |
Final robust subsample after reweighting. |
mean |
Mean estimate based on final robust subsample. |
cov |
Covariance estimate based on final robust subsample. |
Steffen Liebscher <steffen.liebscher@wiwi.uni-halle.de>
Liebscher, S., Kirschstein, T. (2015): Efficiency of the pMST and RDELA Location and Scatter Estimators, AStA-Advances in Statistical Analysis, 99(1), 63-82, DOI: 10.1007/s10182-014-0231-7.
Liebscher, S., Kirschstein, T., and Becker, C. (2013): RDELA - A Delaunay-Triangulation-based, Location and Covariance Estimator with High Breakdown Point, Statistics and Computing, DOI: 10.1007/s11222-012-9337-5.
1 | # rdela(halle)
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