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      <title>Expressions dialog box</title>
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      <div class="title_topic3" id="xps10_pagetitle">Expressions dialog box</div>
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      <p class="para_topic">Expressions in NX are similar to part equations in I-deas.</p>
      <p class="para_topic">Display the <b class="uiTerm">Expressions</b> dialog box using the menu <b class="uiTerm">Insert</b> &rarr; <b class="uiTerm">Expression</b>.
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      <p align="center"><img align="bottom" src="graphics/parts/expressions_less.gif"></p>
      <p class="para_topic">Display the entire dialog box showing all equations.</p>
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            <p class="para_item"><img align="bottom" src="graphics/icons/icon_more_options.gif" border="0"> <b class="uiTerm">More Options</b></p>
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            <p class="para_item">Set <b class="uiTerm">Listed Expressions</b> to <b class="uiTerm">All</b>.
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      <p align="center"><img align="bottom" src="graphics/parts/expressions.gif"></p>
      <p class="para_topic">The simplest equations are the parameter names automatically assigned such as &quot;p0,&quot; &quot;p1,&quot; etc. </p>
      <p class="para_topic">You can rename these parameters with meaningful names. You can also enter more complex engineering expressions.</p>
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                  <p class="para_tip_body">Just as in I-deas, it's a good practice to give parameters meaningful names, especially the key parameters you expect to modify.</p>
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      <p class="para_topic">You can create simple expressions by entering it in an input box when defining a parameter instead of entering a numeric value. For example, when creating a pad feature, instead of entering &quot;10,&quot; enter &quot;Length=10.&quot; This names the parameter &quot;Length&quot; instead of something like &quot;p18.&quot;</p>
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            <p class="para_item"><img align="bottom" src="graphics/widgets/field.gif" border="0"> <i class="variableText">Length=10</i></p>
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                  <p class="para_tip_body">It's a good practice to define known key parameters before creating geometry. This is easy to do in NX because the .prt file can contain expressions even before geometry is created.</p>
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      </table><a name="qt_parts_spreadsheet"></a><a name="ndxgenid_roadmap385"></a><div class="title_division">Edit expressions with a spreadsheet</div>
      <p class="para_division">Expressions can be transferred to a spreadsheet using the <b class="uiTerm">Spreadsheet Edit</b> button on the <b class="uiTerm">Expressions</b> dialog box.
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      <p align="center"><img align="bottom" src="graphics/icons/icon-spreadsheet.gif"></p>
      <p class="para_division">On Windows machines, NX uses the Excel spreadsheet.</p>
      <p align="center"><img align="bottom" src="graphics/parts/spreadsheet1.gif"></p>
      <p class="para_division">In Excel, modify dimension values or expressions in the green column as necessary, then use <b class="uiTerm">Tools</b> &rarr; <b class="uiTerm">Update Expr</b> and <b class="uiTerm">File</b> &rarr; <b class="uiTerm">Close</b> to bring the modified set of equations back into NX.
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      <p class="para_division">See also:</p>
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            <p class="para_item">Help: <img align="bottom" src="graphics/widgets/book_closed.gif" border="0"> Design &rarr; Modeling &rarr;  Modeling Menu Quick Reference &rarr; Modeling Tools Options  &rarr; Expression
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            <p class="para_item">Help: <img align="bottom" src="graphics/widgets/book_closed.gif" border="0"> Design &rarr; Modeling &rarr;  Modeling Tools &rarr; Expressions Editor
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