et_simplex(this, x)  
</h3>
  <p>Sets an N-by-(N+1) matrix as the current simplex.  Notice, if
this matrix is different in size from the problem dimensionallity,
the Nelder-Mead routine will replace it with an appropriately sized
matrix.</p>

  <h4>Arguments</h4>
      <table class="table table-striped varlist">
    <thead>
      <tr>
        <th>Type</th>
<th>Intent</th><th>Optional</th>        <th>Attributes</th>
        <th></th>
        <th>Name</th>
        <th></th>
    </thead>
    <tbody>
        <t