lass="r-pr">#&gt;</span> initial  value 748.598955 </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  10 value 498.747959</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  20 value 379.009462</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  30 value 357.084414</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  40 value 349.201025</span>
<span class="r-out co"><span class="r-pr">#&gt;</span> iter  50 value 349.101543</span>
<span c