lass="r-pr">#&gt;</span> initial  value 748.598955 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  10 value 492.222394</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  20 value 395.522132</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  30 value 362.437336</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  40 value 358.054768</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  50 value 358.018657</span>
<span c