 <span class="at">descriptorfile =</span> <span class="st">&quot;X.desc&quot;</span>)</span>
<span id="cb9-3"><a href="#cb9-3" aria-hidden="true" tabindex="-1"></a><span class="co"># Xbig &lt;- attach.big.matrix(&quot;X.desc&quot;) # much faster</span></span>
<span id="cb9-4"><a href="#cb9-4" aria-hidden="true" tabindex="-1"></a>y <span class="ot">&lt;-</span> <span class="fu">read.table</span>(<span class="st">&quot;y.txt&quot;</span>)</span>
<span id="cb9-5"><a href="#cb9-5" aria-hidden="true" tabindex="-