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save_models.html
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save_models.html
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<h1>Save models to disk and load models from disk</h1>
<small class="dont-index">Source: <a href='https://github.com/HealthCatalyst/healthcareai-r/blob/master/R/save_load.R'><code>R/save_load.R</code></a></small>
<div class="hidden name"><code>save_models.Rd</code></div>
</div>
<div class="ref-description">
<p>Note that model objects contain training data, except columns
ignored (patient_id in the example below). Therefore, if there is PHI in
the training data, the saved model object must be treated as PHI.
<code>save_models</code> issues a message saying as much.</p>
</div>
<pre class="usage"><span class='fu'>save_models</span>(<span class='no'>x</span>, <span class='kw'>filename</span> <span class='kw'>=</span> <span class='st'>"models.RDS"</span>, <span class='kw'>sanitize_phi</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>)
<span class='fu'>load_models</span>(<span class='no'>filename</span>)</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>x</th>
<td><p>model_list object</p></td>
</tr>
<tr>
<th>filename</th>
<td><p>File path to save model to or read model from, e.g.
"models/my_models.RDS". Default for <code>save_models</code> is "models.RDS" in
the working directory (<code><a href='https://rdrr.io/r/base/getwd.html'>getwd()</a></code>). Default for <code>load_models</code> is
to open a dialog box from which a file can be selected, in which case a
message will issued with code to load the same file without interactivity.</p></td>
</tr>
<tr>
<th>sanitize_phi</th>
<td><p>Logical. If TRUE (default) training data is removed from
the model object before being saved. Removing training data is important
when sharing models that were trained with data that contain PHI. If
removed, <code><a href='explore.html'>explore</a></code> will not have data to process.</p></td>
</tr>
</table>
<h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
<p><code>load_models</code> returns the model_list which can be assigned to
any variable name</p>
<h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2>
<pre class="examples"><div class='input'><span class='kw'>if</span> (<span class='fl'>FALSE</span>) {
<span class='no'>m</span> <span class='kw'><-</span> <span class='fu'><a href='machine_learn.html'>machine_learn</a></span>(<span class='no'>pima_diabetes</span>, <span class='no'>patient_id</span>, <span class='kw'>outcome</span> <span class='kw'>=</span> <span class='no'>diabetes</span>)
<span class='fu'>save_models</span>(<span class='no'>m</span>, <span class='st'>"diabetes_models.RDS"</span>)
<span class='co'># Restart R, move RDS file to another computer, etc.</span>
<span class='no'>m2</span> <span class='kw'><-</span> <span class='fu'>load_models</span>(<span class='st'>"diabetes_models.RDS"</span>)
<span class='fu'><a href='https://rdrr.io/r/base/all.equal.html'>all.equal</a></span>(<span class='no'>m</span>, <span class='no'>m2</span>)
}</div></pre>
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