blockPermute

Generates a block permutation p-value. Uses a heuristic to
decide whether to use distance caching or simple block permutations.

Given a multivariate dataset and some knowledge about the dependencies
between its features, it is customary to fit a statistical model to the features
to infer parameters of interest. Such a procedure implicitly assumes that the
sample is exchangeable. This package provides a flexible non-parametric test
of this exchangeability assumption, allowing the user to specify the feature
dependencies by hand as long as features can be grouped into disjoint independent sets.
This package also allows users to test a dual hypothesis, which is, given that the
sample is exchangeable, does a proposed grouping of the features into disjoint sets
also produce statistically independent sets of features? See Aw, Spence and Song (2023)
for the accompanying paper.

Alan Aw

flintyR

Simple and Flexible Tests of Sample Exchangeability

Jeffrey Spence

blockPermute function

<dl><dt>X</dt>
<dd>The binary or real matrix on which to perform
permutation resampling</dd>
<dt>block_boundaries</dt>
<dd>Vector denoting the positions where a new
block of non-independent features starts. Default is NULL.</dd>
<dt>block_labels</dt>
<dd>Length \(P\) vector recording the block label of each feature.
Default is NULL.</dd>
<dt>nruns</dt>
<dd>The resampling number (use at least 1000)</dd>
<dt>type</dt>
<dd>Either an unbiased estimate ('unbiased'), or exact ('valid') p-value (see Hemerik and Goeman, 2018), or both ('both').</dd>
<dt>p</dt>
<dd>The power p of \(l_p^p\), i.e., \(||x||_p^p = (x_1^p+...x_n^p)\)</dd></dl>

Arguments

p-value Computation for Test of Exchangeability with Block Dependencies — blockPermute

<dl>

<dt>X</dt>
<dd>The binary or real matrix on which to perform
permutation resampling</dd>


<dt>block_boundaries</dt>
<dd>Vector denoting the positions where a new
block of non-independent features starts. Default is NULL.</dd>


<dt>block_labels</dt>
<dd>Length \(P\) vector recording the block label of each feature.
Default is NULL.</dd>


<dt>nruns</dt>
<dd>The resampling number (use at least 1000)</dd>


<dt>type</dt>
<dd>Either an unbiased estimate ('unbiased'), or exact ('valid') p-value (see Hemerik and Goeman, 2018), or both ('both').</dd>


<dt>p</dt>
<dd>The power p of \(l_p^p\), i.e., \(||x||_p^p = (x_1^p+...x_n^p)\)</dd>

</dl>

blockPermute: p-value Computation for Test of Exchangeability with Block Dependencies

Description

Usage

Value

Arguments

Details