rootmatrix

Find the root matrix (<code>x</code>) from the Gram matrix (i.e., <code>crossprod(x)</code>).
This is also useful when the input is a covariance matrix, up to a scaling factor of n-1, where n is the sample size.

Exploratory principal component analysis for large-scale dataset, including sparse principal component analysis and sparse matrix approximation.

Fan Chen

epca

Exploratory Principal Component Analysis

rootmatrix function

<dl><dt>x</dt>
<dd>a symmetric <code>matrix</code> (will trigger error if not symmetric).</dd></dl>

Arguments

Find root matrix — rootmatrix

<dl>

<dt>x</dt>
<dd>a symmetric <code>matrix</code> (will trigger error if not symmetric).</dd>

</dl>

rootmatrix: Find root matrix

Description

Usage

Arguments