Ltrans

This function is to map the upper triganle part of a symmetric matrix into a vector.

To decompose symmetric matrices such as brain connectivity matrices so that one can extract sparse latent component matrices and also estimate mixing coefficients, a blind source separation (BSS) method named LOCUS was proposed in Wang and Guo (2023) <arXiv:2008.08915>. For brain connectivity matrices, the outputs correspond to sparse latent connectivity traits and individual-level trait loadings.

Jialu Ran

LOCUS

Low-Rank Decomposition of Brain Connectivity Matrices with
Uniform Sparsity

Yikai Wang

Ying Guo

Ltrans function

<dl> <dt>X</dt>
<dd>A symmetric matrix of dimentional V by V.</dd> <dt>d</dt>
<dd>Whether to include the diagonal part of <code>X</code>.</dd></dl>

Arguments

Map a symmetric matrix into its upper triangle part. — Ltrans

<dl>

 <dt>X</dt>
<dd>A symmetric matrix of dimentional V by V.</dd>

 <dt>d</dt>
<dd>Whether to include the diagonal part of <code>X</code>.</dd>

</dl>

Ltrans: Map a symmetric matrix into its upper triangle part.

Description

Usage

Value

Arguments