"><pre class="sourceCode r"><code class="sourceCode r">m &lt;-<span class="st"> </span><span class="kw">lfief</span>(<span class="dt">wavelength=</span><span class="dv">633</span>, <span class="dt">angle=</span><span class="dv">44</span><span class="op">*</span>pi<span class="op">/</span><span class="dv">180</span>, <span class="dt">polarisation=</span><span class="st">'p'</span>,
           <span class="dt">thickness=</span><span class="kw">c</span>(<span class="dv">0</span>, <span class="dv">50</span>, <s