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<!-- Generated by pkgdown: do not edit by hand -->
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<title>Jackknife Estimation of NOHARM Analysis — R2noharm.jackknife • sirt</title>
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to get standard errors based on a replication method (see Christoffersson, 1977)." />
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<h1>Jackknife Estimation of NOHARM Analysis</h1>
<div class="hidden name"><code>R2noharm.jackknife.Rd</code></div>
</div>
<div class="ref-description">
<p>This function performs a jackknife estimation of NOHARM analysis
to get standard errors based on a replication method (see Christoffersson, 1977).</p>
</div>
<pre class="usage"><span class='fu'>R2noharm.jackknife</span>(<span class='no'>object</span>, <span class='kw'>jackunits</span><span class='kw'>=</span><span class='kw'>NULL</span>)
<span class='co'># S3 method for R2noharm.jackknife</span>
<span class='fu'><a href='https://rdrr.io/r/base/summary.html'>summary</a></span>(<span class='no'>object</span>, <span class='kw'>logfile</span><span class='kw'>=</span><span class='kw'>NULL</span>, <span class='no'>...</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>object</th>
<td><p>Object of class <code>R2noharm</code></p></td>
</tr>
<tr>
<th>jackunits</th>
<td><p>A vector of integers or a number. If it is a number, then it refers
to the number of jackknife units. If it is a vector of integers, then this vector
defines the allocation of persons jackknife units. Integers corresponds to
row indexes in the data set.</p></td>
</tr>
<tr>
<th>logfile</th>
<td><p>File name if the summary should be sunk into a file</p></td>
</tr>
<tr>
<th>...</th>
<td><p>Further arguments to be passed</p></td>
</tr>
</table>
<h2 class="hasAnchor" id="value"><a class="anchor" href="#value"></a>Value</h2>
<p>A list of lists with following entries:</p>
<dt>partable</dt><dd><p>Data frame with parameters</p></dd>
<dt>se.pars</dt><dd><p>List of estimated standard errors for all parameter estimates:
<code>tanaka.stat</code>, <code>rmsr.stat</code>, <code>rmsea.stat</code>,
<code>chisquare_df.stat</code>, <code>thresholds.stat</code>, <code>final.constants.stat</code>,
<code>uniquenesses.stat</code>, <code>factor.cor.stat</code>, <code>loadings.stat</code>,
<code>loadings.theta.stat</code></p></dd>
<dt>jackknife.pars</dt><dd><p>List with obtained results by jackknifing for all parameters:
<code>j.tanaka</code>, <code>j.rmsr</code>, <code>rmsea</code>, <code>chisquare_df</code>,
<code>j.pm</code>, <code>j.thresholds</code>, <code>j.factor.cor</code>,
<code>j.loadings</code>, <code>j.loadings.theta</code></p></dd>
<dt>u.jacknunits</dt><dd><p>Unique jackknife elements</p></dd>
<h2 class="hasAnchor" id="references"><a class="anchor" href="#references"></a>References</h2>
<p>Christoffersson, A. (1977). Two-step weighted least squares factor analysis of
dichotomized variables. <em>Psychometrika, 42</em>, 433-438.</p>
<h2 class="hasAnchor" id="see-also"><a class="anchor" href="#see-also"></a>See also</h2>
<div class='dont-index'><p><code><a href='R2noharm.html'>R2noharm</a></code></p></div>
</div>
<div class="col-md-3 hidden-xs hidden-sm" id="sidebar">
<h2>Contents</h2>
<ul class="nav nav-pills nav-stacked">
<li><a href="#arguments">Arguments</a></li>
<li><a href="#value">Value</a></li>
<li><a href="#references">References</a></li>
<li><a href="#see-also">See also</a></li>
</ul>
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