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<span class="va">L1</span> <span class="op">&lt;-</span> <span class="fu"><a href="../reference/as_sym.html">as_sym</a></span><span class="op">(</span><span class="va">L1</span><span class="op">)</span></code></pre></div>
<p>Since <span class="math inline">\(\mathbf{Var}(e)=v^2 I\)</span> we have <span class="math inline">\(\mathbf{Var}(e)=v^2 I=L \mathbf{Var}(x) L'\)</span> so the covariance matrix of <span class="math inline">\(x\)</span> is <span class="math inline">\(V_1=\mathbf{Var}(x) = v^2 L