matrix</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/c.html'>c</a></span><span class='op'>(</span><span class='op'>-</span><span class='fl'>0.4</span>, <span class='fl'>0.4</span>, <span class='fl'>0.2</span>, <span class='op'>-</span><span class='fl'>0.2</span><span class='op'>)</span>, ncol <span class='op'>=</span> <span class='fl'>2</span>, byrow <span class='op'>=</span> <span class='cn'>TRUE</span><span class='op'>)</span>
<span class='fu'>pp_mmpp</span><span clas