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OptimizationProblem-class.html
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OptimizationProblem-class.html
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<h1>Optimization problem class</h1>
<small class="dont-index">Source: <a href='https://github.com/prioritizr/prioritizr/blob/master/R/OptimizationProblem-proto.R'><code>R/OptimizationProblem-proto.R</code></a></small>
<div class="hidden name"><code>OptimizationProblem-class.Rd</code></div>
</div>
<div class="ref-description">
<p>The <code>OptimizationProblem</code> class is used to represent an optimization
problem. Data are stored in memory and accessed using an external pointer.
<strong>Only experts should interact with this class directly.</strong></p>
</div>
<h2 class="hasAnchor" id="fields"><a class="anchor" href="#fields"></a>Fields</h2>
<dl>
<dt>$ptr</dt><dd><p><code>externalptr</code> object.</p></dd>
</dl>
<h2 class="hasAnchor" id="usage"><a class="anchor" href="#usage"></a>Usage</h2>
<p><code>x$print()</code></p>
<p><code>x$show()</code></p>
<p><code>x$repr()</code></p>
<p><code>x$ncol()</code></p>
<p><code>x$nrow()</code></p>
<p><code>x$ncell()</code></p>
<p><code>x$modelsense()</code></p>
<p><code>x$vtype()</code></p>
<p><code>x$obj()</code></p>
<p><code>x$A()</code></p>
<p><code>x$rhs()</code></p>
<p><code>x$sense()</code></p>
<p><code>x$lb()</code></p>
<p><code>x$ub()</code></p>
<p><code>x$number_of_planning_units()</code></p>
<p><code>x$number_of_features()</code></p>
<p><code>x$number_of_zones()</code></p>
<p><code>x$row_ids()</code></p>
<p><code>x$col_ids()</code></p>
<p><code>x$compressed_formulation()</code></p>
<h2 class="hasAnchor" id="arguments"><a class="anchor" href="#arguments"></a>Arguments</h2>
<dl>
<dt>ptr</dt><dd><p><code>externalptr</code> object.</p></dd>
</dl>
<h2 class="hasAnchor" id="details"><a class="anchor" href="#details"></a>Details</h2>
<dl>
<dt>print</dt><dd><p>print the object.</p></dd>
<dt>show</dt><dd><p>show the object.</p></dd>
<dt>repr</dt><dd><p><code>character</code> representation of object.</p></dd>
<dt>ncol</dt><dd><p><code>integer</code> number of columns (variables) in model matrix.</p></dd>
<dt>nrow</dt><dd><p><code>integer</code> number of rows (constraints) in model matrix.</p></dd>
<dt>ncell</dt><dd><p><code>integer</code> number of cells in model matrix.</p></dd>
<dt>modelsense</dt><dd><p><code>character</code> model sense.</p></dd>
<dt>vtype</dt><dd><p><code>character</code> vector of variable types.</p></dd>
<dt>obj</dt><dd><p><code>numeric</code> vector of objective function.</p></dd>
<dt>A</dt><dd><p><code>dgCMatrix</code> model matrix</p></dd>
<dt>rhs</dt><dd><p><code>numeric</code> vector of right-hand-side constraints.</p></dd>
<dt>sense</dt><dd><p><code>character</code> vector of constraint senses.</p></dd>
<dt>lb</dt><dd><p><code>numeric</code> vector of lower bounds for each decision variable.</p></dd>
<dt>ub</dt><dd><p><code>numeric</code> vector of upper bounds for each decision variable.</p></dd>
<dt>number_of_features</dt><dd><p><code>integer</code> number of features in the problem.</p></dd>
<dt>number_of_planning_units</dt><dd><p><code>integer</code> number of planning units in
the problem.</p></dd>
<dt>number_of_zones</dt><dd><p><code>integer</code> number of zones in the
problem.</p></dd>
<dt>col_ids</dt><dd><p><code>character</code> names describing each decision variable
(column) in the model matrix.</p></dd>
<dt>row_ids</dt><dd><p><code>character</code> names describing each constraint (row) in
in the model matrix.</p></dd>
<dt>compressed_formulation</dt><dd><p>is the optimization problem formulated
using a compressed version of the rij matrix?</p></dd>
<dt>shuffle_columns</dt><dd><p>randomly shuffle the columns in the problem. This
should almost never be called manually and only should only be called
after the optimization problem has been fully constructed.</p></dd>
</dl>
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