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PSDConstraint-class.html
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PSDConstraint-class.html
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<title>The PSDConstraint class. — %>>% • CVXR</title>
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<meta property="og:title" content="The PSDConstraint class. — %>>%" />
<meta property="og:description" content="This class represents the positive semidefinite constraint, \(\frac{1}{2}(X + X^T) \succeq 0\), i.e. \(z^T(X + X^T)z \geq 0\) for all \(z\)." />
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<h1>The PSDConstraint class.</h1>
<small class="dont-index">Source: <a href='https://github.com/cvxgrp/CVXR/blob/master/R/generics.R'><code>R/generics.R</code></a>, <a href='https://github.com/cvxgrp/CVXR/blob/master/R/expressions.R'><code>R/expressions.R</code></a>, <a href='https://github.com/cvxgrp/CVXR/blob/master/R/constraints.R'><code>R/constraints.R</code></a></small>
<div class="hidden name"><code>PSDConstraint-class.Rd</code></div>
</div>
<div class="ref-description">
<p>This class represents the positive semidefinite constraint, \(\frac{1}{2}(X + X^T) \succeq 0\), i.e. \(z^T(X + X^T)z \geq 0\) for all \(z\).</p>
</div>
<pre class="usage">e1 %>>% e2
e1 %<<% e2
# S4 method for Expression,Expression
%&gt;&gt;%(e1, e2)
# S4 method for Expression,ConstVal
%&gt;&gt;%(e1, e2)
# S4 method for ConstVal,Expression
%&gt;&gt;%(e1, e2)
# S4 method for Expression,Expression
%&lt;&lt;%(e1, e2)
# S4 method for Expression,ConstVal
%&lt;&lt;%(e1, e2)
# S4 method for ConstVal,Expression
%&lt;&lt;%(e1, e2)
PSDConstraint(expr, id = NA_integer_)
# S4 method for PSDConstraint
name(x)
# S4 method for PSDConstraint
is_dcp(object)
# S4 method for PSDConstraint
is_dgp(object)
# S4 method for PSDConstraint
residual(object)
# S4 method for PSDConstraint
canonicalize(object)</pre>
<h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
<table class="ref-arguments">
<colgroup><col class="name" /><col class="desc" /></colgroup>
<tr>
<th>e1, e2</th>
<td><p>The <a href='Expression-class.html'>Expression</a> objects or numeric constants to compare.</p></td>
</tr>
<tr>
<th>expr</th>
<td><p>An <a href='Expression-class.html'>Expression</a>, numeric element, vector, or matrix representing \(X\).</p></td>
</tr>
<tr>
<th>id</th>
<td><p>(Optional) A numeric value representing the constraint ID.</p></td>
</tr>
<tr>
<th>x, object</th>
<td><p>A PSDConstraint object.</p></td>
</tr>
</table>
<h2 class="hasAnchor" id="methods-by-generic-"><a class="anchor" href="#methods-by-generic-"></a>Methods (by generic)</h2>
<ul>
<li><p><code>name</code>: The string representation of the constraint.</p></li>
<li><p><code>is_dcp</code>: The constraint is DCP if the left-hand and right-hand expressions are affine.</p></li>
<li><p><code>is_dgp</code>: Is the constraint DGP?</p></li>
<li><p><code>residual</code>: A <a href='Expression-class.html'>Expression</a> representing the residual of the constraint.</p></li>
<li><p><code>canonicalize</code>: The graph implementation of the object. Marks the top level constraint as the <code>dual_holder</code> so the dual value will be saved to the PSDConstraint.</p></li>
</ul>
<h2 class="hasAnchor" id="slots"><a class="anchor" href="#slots"></a>Slots</h2>
<dl'>
<dt><code>expr</code></dt><dd><p>An <a href='Expression-class.html'>Expression</a>, numeric element, vector, or matrix representing \(X\).</p></dd>
</dl>
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