DepthProc (version 1.0.1)

depthProjection: Projection Depth

Description

Computes the Projection depth of a point or vectors of points with respect to a multivariate data set.

Usage

depthProjection(u, X, ndir = 1000, name = "X", threads = -1, ...)

Arguments

u

Numerical vector or matrix whose depth is to be calculated. Dimension has to be the same as that of the observations.

X

The data as a matrix, data frame or list. If it is a matrix or data frame, then each row is viewed as one multivariate observation. If it is a list, all components must be numerical vectors of equal length (coordinates of observations).

ndir

number of directions used in computations

threads

number of threads used in parallel computations. Default value -1 means that all possible cores will be used.

name

name for this data set - it will be used on plots from depthproc.

...

currently not supported.

Details

Irrespective of dimension, Projection and Tukey's depth is obtained by approximate calculation.

Returns the depth of multivariate point u with respect to data set X.

Examples

x <- matrix(rnorm(3000), nc = 3)

 #Same results
 set.seed(1)
 a = depthProjection(x, x, ndir = 2000)
 set.seed(1)
 b = depthProjection(x, x, ndir = 2000)
 all(a == b)
 #Different
 depthProjection(x, x, ndir = 2000) == depthProjection(x, x, ndir = 2000)