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      <title>Non-Linear 2D Sidel Iteration Goal Seek</title>
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      <div class="title_topic5" id="xps10_pagetitle">Non-Linear 2D Sidel Iteration Goal Seek</div>
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      <p class="para_topic"> Non-Linear Sidel iteration is a more specialized 2d solver, where:</p>
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               <p class="para_td"> Given:</p>
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               <p class="para_td"> f(x,y) = p1 and g(x,y) = p2</p>
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               <p class="para_td"> Solve such that:</p>
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               <p class="para_td"> p1 = x ( or f(x,y) = x )</p>
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               <p class="para_td"> and:</p>
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               <p class="para_td"> p2 = y ( or g(x,y) = y ).</p>
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      </table><br><p class="para_topic"> Basically you can think of this function as making the variable cells equal to the corresponding target cells.</p>
      <p class="para_topic"> With Options&rarr;Setup Goal Seek set to Nonlinear Sidel 2D, selecting Tools&rarr;Goal Seek displays the Nonlinear Side 2D Goal Seek dialog. Sidel Iteration requires the following information:</p>
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               <p class="para_td"> Variable Cell 1</p>
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               <p class="para_td"> The cell location to change.</p>
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               <p class="para_td"> Start Point 1</p>
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               <p class="para_td"> The optional initial guess.</p>
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               <p class="para_td"> Target Cell 1</p>
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               <p class="para_td"> The cell location for result.</p>
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               <p class="para_td"> Variable Cell 2</p>
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               <p class="para_td"> The cell location to change.</p>
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               <p class="para_td"> Start Point 2</p>
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               <p class="para_td"> The optional initial guess.</p>
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               <p class="para_td"> Target Cell 2</p>
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               <p class="para_td"> The cell location for result.</p>
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               <p class="para_td"> Tolerance</p>
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               <p class="para_td"> The desired accuracy of convergence.</p>
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               <p class="para_td"> Max Iterations</p>
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               <p class="para_td"> The number of iterations allowed.</p>
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      </table><br><p class="para_topic"> Initial start points may again be blank, in which case the current value of the variable cell is used as the initial guess.</p>
      <p class="para_topic"> Sidel Iteration has the standard error conditions plus the following error conditions:</p>
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            <p class="para_item"> Floating point error - Output values are very large (&gt;1.0e100) and diverging.</p>
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