naiveBlockPermute1: Resampling V Statistic (Version 1)

In flintyR: Simple and Flexible Tests of Sample Exchangeability

Resampling V Statistic (Version 1)

Description

Generates a new array \mathbf{X}' under the permutation null and then returns the V statistic computed for \mathbf{X}'.

Usage

naiveBlockPermute1(X, block_labels, p)

Arguments

X	The N \times P binary or real matrix
block_labels	A vector of length P, whose pth component indicates the block membership of feature p
p	The power p of l_p^p, i.e., ||x||_p^p = (x_1^p+...x_n^p)

Details

This is Version 1, which takes in the block labels. It is suitable in the most general setting, where the features are grouped by labels. Given original \mathbf{X} and a list denoting labels of each feature, independently permutes the rows within each block of \mathbf{X} and returns resulting V. If block labels are not specified, then features are assumed independent, which is to say that block_labels is set to 1:ncol(\mathbf{X}).

Dependencies: getBinVStat, getRealVStat

Value

V(\mathbf{X}'), where \mathbf{X}' is a resampled by permutation of entries blockwise

Examples

X <- matrix(nrow = 5, ncol = 10, rnorm(50)) # real matrix example
naiveBlockPermute1(X, block_labels = c(1,1,2,2,3,3,4,4,5,5), p = 2) # use Euclidean distance

X <- matrix(nrow = 5, ncol = 10, rbinom(50, 1, 0.5)) # binary matrix example
naiveBlockPermute1(X, block_labels = c(1,1,2,2,3,3,4,4,5,5))

flintyR documentation built on March 31, 2023, 8:19 p.m.