qr_solve_exact

This is the same function as <code>qr.solve</code>, but it throws an error if an exact fit cannot
be found (instead of returning a least square fitted value, which is the default behavior
of <code>qr.solve</code>).

internal

Implementation of the automatic shift detection method for
Brownian Motion (BM) or Ornstein–Uhlenbeck (OU) models of trait evolution on
phylogenies. Some tools to handle equivalent shifts configurations are also
available. See Bastide et al. (2017) <doi:10.1111/rssb.12206> and
Bastide et al. (2018) <doi:10.1093/sysbio/syy005>.

Paul Bastide

PhylogeneticEM

Automatic Shift Detection using a Phylogenetic EM

Mahendra Mariadassou

qr_solve_exact function

<dl><dt>a</dt>
<dd>a QR decomposition or a rectangular matrix.</dd>
<dt>b</dt>
<dd>a vector or matrix of right-hand sides of equations.
<code>incidence.matrix</code>.</dd>
<dt>tol</dt>
<dd>the tolerance for detecting linear dependencies in the columns of x.
Only used if LAPACK is false and x is real.</dd></dl>

Arguments

exact qr.solve — qr_solve_exact

<dl>

<dt>a</dt>
<dd>a QR decomposition or a rectangular matrix.</dd>


<dt>b</dt>
<dd>a vector or matrix of right-hand sides of equations.
<code>incidence.matrix</code>.</dd>


<dt>tol</dt>
<dd>the tolerance for detecting linear dependencies in the columns of x.
Only used if LAPACK is false and x is real.</dd>

</dl>

qr_solve_exact: exact qr.solve

Description

Usage

Arguments