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If two fitted +mkinfit objects are given as arguments, it is checked if they have been +fitted to the same data. It is the responsibility of the user to make sure +that the models are nested, i.e. one of them has less degrees of freedom +and can be expressed by fixing the parameters of the other.</p> + </div> + + <pre class="usage"><span class='co'># S3 method for mkinfit</span> +<span class='fu'><a href='https://rdrr.io/pkg/lmtest/man/lrtest.html'>lrtest</a></span>(<span class='no'>object</span>, <span class='kw'>object_2</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>An <code><a href='mkinfit.html'>mkinfit</a></code> object</p></td> + </tr> + <tr> + <th>object_2</th> + <td><p>Optionally, another mkinfit object fitted to the same data.</p></td> + </tr> + <tr> + <th>...</th> + <td><p>Argument to <code><a href='mkinfit.html'>mkinfit</a></code>, passed to +<code><a href='update.mkinfit.html'>update.mkinfit</a></code> for creating the alternative fitted object.</p></td> + </tr> + </table> + + <h2 class="hasAnchor" id="details"><a class="anchor" href="#details"></a>Details</h2> + + <p>Alternatively, an argument to mkinfit can be given which is then passed +to <code><a href='update.mkinfit.html'>update.mkinfit</a></code> to obtain the alternative model.</p> +<p>The comparison is then made by the <code><a href='https://rdrr.io/pkg/lmtest/man/lrtest.html'>lrtest.default</a></code> +method from the lmtest package. The model with the higher number of fitted +parameters (alternative hypothesis) is listed first, then the model with the +lower number of fitted parameters (null hypothesis).</p> + + <h2 class="hasAnchor" id="examples"><a class="anchor" href="#examples"></a>Examples</h2> + <pre class="examples"><div class='input'><span class='co'># \dontrun{</span> +<span class='no'>test_data</span> <span class='kw'><-</span> <span class='fu'><a href='https://rdrr.io/r/base/subset.html'>subset</a></span>(<span class='no'>synthetic_data_for_UBA_2014</span><span class='kw'>[[</span><span class='fl'>12</span>]]$<span class='no'>data</span>, <span class='no'>name</span> <span class='kw'>==</span> <span class='st'>"parent"</span>) +<span class='no'>sfo_fit</span> <span class='kw'><-</span> <span class='fu'><a href='mkinfit.html'>mkinfit</a></span>(<span class='st'>"SFO"</span>, <span class='no'>test_data</span>, <span class='kw'>quiet</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>) +<span class='no'>dfop_fit</span> <span class='kw'><-</span> <span class='fu'><a href='mkinfit.html'>mkinfit</a></span>(<span class='st'>"DFOP"</span>, <span class='no'>test_data</span>, <span class='kw'>quiet</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>) +<span class='fu'><a href='https://rdrr.io/pkg/lmtest/man/lrtest.html'>lrtest</a></span>(<span class='no'>dfop_fit</span>, <span class='no'>sfo_fit</span>)</div><div class='output co'>#> Likelihood ratio test +#> +#> Model 1: DFOP with error model const +#> Model 2: SFO with error model const +#> #Df LogLik Df Chisq Pr(>Chisq) +#> 1 5 -42.453 +#> 2 3 -63.954 -2 43.002 4.594e-10 *** +#> --- +#> Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1</div><div class='input'><span class='fu'><a href='https://rdrr.io/pkg/lmtest/man/lrtest.html'>lrtest</a></span>(<span class='no'>sfo_fit</span>, <span class='no'>dfop_fit</span>)</div><div class='output co'>#> Likelihood ratio test +#> +#> Model 1: DFOP with error model const +#> Model 2: SFO with error model const +#> #Df LogLik Df Chisq Pr(>Chisq) +#> 1 5 -42.453 +#> 2 3 -63.954 -2 43.002 4.594e-10 *** +#> --- +#> Signif. codes: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1</div><div class='input'><span class='fu'><a href='https://rdrr.io/pkg/lmtest/man/lrtest.html'>lrtest</a></span>(<span class='no'>dfop_fit</span>, <span class='kw'>error_model</span> <span class='kw'>=</span> <span class='st'>"tc"</span>)</div><div class='output co'>#> <span class='error'>Error in mkinfit(mkinmod = "DFOP", observed = test_data, quiet = TRUE, error_model = "tc", parms.ini = c(k1 = 0.359673923258109, k2 = 0.0219997339436148, g = 0.692423284341522), state.ini = c(parent = 103.83323992643)): Objekt 'test_data' nicht gefunden</span></div><div class='input'><span class='fu'><a href='https://rdrr.io/pkg/lmtest/man/lrtest.html'>lrtest</a></span>(<span class='no'>dfop_fit</span>, <span class='kw'>fixed_parms</span> <span class='kw'>=</span> <span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span>(<span class='kw'>k2</span> <span class='kw'>=</span> <span class='fl'>0</span>))</div><div class='output co'>#> <span class='error'>Error in mkinfit(mkinmod = "DFOP", observed = test_data, quiet = TRUE, fixed_parms = ..1, parms.ini = c(k1 = 0.359673923258109, k2 = 0.0219997339436148, g = 0.692423284341522), state.ini = c(parent = 103.83323992643)): Objekt 'test_data' nicht gefunden</span></div><div class='input'># } +</div></pre> + </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="#details">Details</a></li> + <li><a href="#examples">Examples</a></li> + </ul> + + </div> +</div> + + + <footer> + <div class="copyright"> + <p>Developed by Johannes Ranke.</p> +</div> + +<div class="pkgdown"> + <p>Site built with <a href="https://pkgdown.r-lib.org/">pkgdown</a> 1.4.1.</p> +</div> + + </footer> + </div> + + + + + </body> +</html> + + |