span class="va">pca</span><span class="op">$</span><span class="va">scale</span><span class="op">)</span></span></span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [1] TRUE</span>
<span class="r-in"><span></span></span>
<span class="r-in"><span><span class="co"># scores and loadings are the same or opposite</span></span></span>
<span class="r-in"><span><span class="co"># except for last eigenvalue which is equal to 0</span></span></span>
<span class="r-in"><span><span class="co"># due to centerin