sqrt_XtX

internal

Implements Bayesian brain mapping models, including the prior
ICA (independent components analysis) model proposed in Mejia et al. (2020)
<doi:10.1080/01621459.2019.1679638> and the spatial prior ICA model
proposed in proposed in Mejia et al. (2022)
<doi:10.1080/10618600.2022.2104289>. Both models estimate subject-level
brain as deviations from known population-level networks, which are
estimated using standard ICA algorithms. Both models employ an
expectation-maximization algorithm for estimation of the latent brain
networks and unknown model parameters. Includes direct support for 'CIFTI',
'GIFTI', and 'NIFTI' neuroimaging file formats.

Amanda Mejia

BayesBrainMap

Estimate Brain Networks and Connectivity with Population-Derived
Priors

Damon Pham

Daniel Spencer

Mary Beth Nebel

sqrt_XtX function

<dl><dt>X</dt>
<dd>A numerical matrix</dd>
<dt>inverse</dt>
<dd>if inverse=TRUE, compute inverse of square root</dd></dl>

Arguments

Compute matrix square root of X'X — sqrt_XtX

<dl>

<dt>X</dt>
<dd>A numerical matrix</dd>


<dt>inverse</dt>
<dd>if inverse=TRUE, compute inverse of square root</dd>

</dl>

Compute matrix square root of X'X

sqrt_XtX: Compute matrix square root of X'X

Description

Usage

Value

Arguments