lass="r-pr">#&gt;</span> initial  value 751.371544 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  10 value 518.993295</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  20 value 390.221812</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  30 value 361.728448</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  40 value 357.298728</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  50 value 357.058474</span>
<span c