範例：具有奇點的等高線圖

繪圖 > 等高線圖 > 範例：具有奇點的等高線圖

範例：具有奇點的等高線圖

1. 使用已知奇點定義雙變數函數。

按一下以複製此運算式

2. 以等高線圖繪製 F。

按一下以複製此運算式

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          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
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            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
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        </xAxis>
        <yAxis rank="1" legend-position="PlotBoundaryLeft" start="-10" end="10" xml:lang="zh_TW">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
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          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </startValue>
            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </endValue>
          </xyDomain>
        </yAxis>
        <zAxis rank="1" start="-32" end="32" xml:lang="zh_TW">
          <axisLine position="origin" positionticmark="5" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">9</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <zDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </startValue>
            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </endValue>
          </zDomain>
        </zAxis>
      </axes>
      <contour color="#FF000000" show-lables="false" resultRef="20" xml:lang="zh_TW" />
      <graph-size width="192" height="192" xml:lang="zh_TW" />
      <plotEquation xml:lang="zh_TW">
        <math xml:lang="zh_TW">
          <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW" label-is-contextual="true" xmlns="http://schemas.mathsoft.com/math50">F</id>
        </math>
        <math xml:lang="zh_TW">
          <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
        </math>
      </plotEquation>
    </contourPlot>
  </plot>
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3. 將 z 軸值域設為 -25 至 25。

按一下以複製此運算式

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  <plot background-type="transparent" xml:lang="zh_TW">
    <contourPlot xml:lang="zh_TW">
      <axes xml:lang="zh_TW">
        <xAxis rank="1" legend-position="PlotBoundaryBottom" start="-10" end="10" xml:lang="zh_TW">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
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            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
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        </xAxis>
        <yAxis rank="1" legend-position="PlotBoundaryLeft" start="-10" end="10" xml:lang="zh_TW">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
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          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
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            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
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          </xyDomain>
        </yAxis>
        <zAxis rank="1" start="-25" end="25" xml:lang="zh_TW">
          <axisLine position="origin" positionticmark="5" legendWidth="0" xml:lang="zh_TW" />
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            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <zDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW" resultRef="21">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">-25</real>
            </startValue>
            <endValue xml:lang="zh_TW" resultRef="22">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">25</real>
            </endValue>
          </zDomain>
        </zAxis>
      </axes>
      <contour color="#FF000000" show-lables="false" resultRef="23" xml:lang="zh_TW" />
      <graph-size width="192" height="192" xml:lang="zh_TW" />
      <plotEquation xml:lang="zh_TW">
        <math xml:lang="zh_TW">
          <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW" label-is-contextual="true" xmlns="http://schemas.mathsoft.com/math50">F</id>
        </math>
        <math xml:lang="zh_TW">
          <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
        </math>
      </plotEquation>
    </contourPlot>
  </plot>
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4. 修改 y 軸刻度線以放大奇點。

按一下以複製此運算式

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            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
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            <tickMarks display="true" xml:lang="zh_TW" />
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          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
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        <yAxis rank="1" legend-position="PlotBoundaryLeft" start="-0.1" end="0.1" xml:lang="zh_TW">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
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            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
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          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW" resultRef="24">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">-0.1</real>
            </startValue>
            <endValue xml:lang="zh_TW" resultRef="25">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">0.1</real>
            </endValue>
          </xyDomain>
        </yAxis>
        <zAxis rank="1" start="-25" end="25" xml:lang="zh_TW">
          <axisLine position="origin" positionticmark="5" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <zDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW" resultRef="26">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">-25</real>
            </startValue>
            <endValue xml:lang="zh_TW" resultRef="27">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">25</real>
            </endValue>
          </zDomain>
        </zAxis>
      </axes>
      <contour color="#FF000000" show-lables="false" resultRef="28" xml:lang="zh_TW" />
      <graph-size width="212.99999999999955" height="190" xml:lang="zh_TW" />
      <plotEquation xml:lang="zh_TW">
        <math xml:lang="zh_TW">
          <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW" label-is-contextual="true" xmlns="http://schemas.mathsoft.com/math50">F</id>
        </math>
        <math xml:lang="zh_TW">
          <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
        </math>
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    </contourPlot>
  </plot>
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紅色與藍色區域代表 z 軸的值落在 -25 至 +25 值域之外的區域。

5. 刪除所有三個使用者定義的刻度線值，以還原預設 z 軸的值。

按一下以複製此運算式

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    <contourPlot xml:lang="zh_TW">
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          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
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        </xAxis>
        <yAxis rank="1" legend-position="PlotBoundaryLeft" start="-0.1" end="0.1" xml:lang="zh_TW">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
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          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW" resultRef="29">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">-0.1</real>
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            <endValue xml:lang="zh_TW" resultRef="30">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">0.1</real>
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          </xyDomain>
        </yAxis>
        <zAxis rank="1" start="-3200" end="3200" xml:lang="zh_TW">
          <axisLine position="origin" positionticmark="5" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">9</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <zDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </startValue>
            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </endValue>
          </zDomain>
        </zAxis>
      </axes>
      <contour color="#FF000000" show-lables="false" resultRef="31" xml:lang="zh_TW" />
      <graph-size width="212.99999999999955" height="190" xml:lang="zh_TW" />
      <plotEquation xml:lang="zh_TW">
        <math xml:lang="zh_TW">
          <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW" label-is-contextual="true" xmlns="http://schemas.mathsoft.com/math50">F</id>
        </math>
        <math xml:lang="zh_TW">
          <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
        </math>
      </plotEquation>
    </contourPlot>
  </plot>
</region>

6. 將 y 軸的刻度線下限設定為零，以檢視繪圖的上半部。

按一下以複製此運算式

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          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
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          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
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              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
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        <yAxis rank="1" legend-position="PlotBoundaryLeft" start="0" end="0.1" xml:lang="zh_TW">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
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            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
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          <markers xml:lang="zh_TW" />
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          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
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              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">0</real>
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            <endValue xml:lang="zh_TW" resultRef="33">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">0.1</real>
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          </xyDomain>
        </yAxis>
        <zAxis rank="1" start="-32" end="32" xml:lang="zh_TW">
          <axisLine position="origin" positionticmark="5" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
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          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <zDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </startValue>
            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </endValue>
          </zDomain>
        </zAxis>
      </axes>
      <contour color="#FF000000" show-lables="false" resultRef="34" xml:lang="zh_TW" />
      <graph-size width="212.99999999999955" height="190" xml:lang="zh_TW" />
      <plotEquation xml:lang="zh_TW">
        <math xml:lang="zh_TW">
          <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW" label-is-contextual="true" xmlns="http://schemas.mathsoft.com/math50">F</id>
        </math>
        <math xml:lang="zh_TW">
          <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
        </math>
      </plotEquation>
    </contourPlot>
  </plot>
</region>

由於 y=0 處有一個奇點，因此等高線圖無法計算數據。

7. 將 y 軸的刻度線值下限設定為比零稍小的值。

按一下以複製此運算式

<region id="ID0EAT5QB" actualWidth="284.51999999999953" actualHeight="243.03333333333336" top="1440.0000000000002" left="19.200000000000003" xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/worksheet50">
  <plot background-type="transparent" xml:lang="zh_TW">
    <contourPlot xml:lang="zh_TW">
      <axes xml:lang="zh_TW">
        <xAxis rank="1" legend-position="PlotBoundaryBottom" start="-10" end="10" xml:lang="zh_TW">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </startValue>
            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </endValue>
          </xyDomain>
        </xAxis>
        <yAxis rank="1" legend-position="PlotBoundaryLeft" start="-0.01" end="0.1" xml:lang="zh_TW">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">12</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <xyDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW" resultRef="35">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">-0.01</real>
            </startValue>
            <endValue xml:lang="zh_TW" resultRef="36">
              <real xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">0.1</real>
            </endValue>
          </xyDomain>
        </yAxis>
        <zAxis rank="1" start="-7500" end="7500" xml:lang="zh_TW">
          <axisLine position="origin" positionticmark="5" legendWidth="0" xml:lang="zh_TW" />
          <axisGrid xml:lang="zh_TW">
            <gridFrequency xml:lang="zh_TW">11</gridFrequency>
            <gridLabels display="true" xml:lang="zh_TW" />
            <gridLines xml:lang="zh_TW" />
            <tickMarks display="true" xml:lang="zh_TW" />
          </axisGrid>
          <axisLabel xml:lang="zh_TW" />
          <markers xml:lang="zh_TW" />
          <numberFormat xml:lang="zh_TW">
            <general precision="3" show-trailing-zeros="false" radix="dec" zero-threshold="15" imaginary-value="i" exponential-threshold="3" xml:lang="zh_TW" />
          </numberFormat>
          <zDomain scale-type="linear" auto-scale="true" xml:lang="zh_TW">
            <startValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </startValue>
            <endValue xml:lang="zh_TW">
              <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
            </endValue>
          </zDomain>
        </zAxis>
      </axes>
      <contour color="#FF000000" show-lables="false" resultRef="37" xml:lang="zh_TW" />
      <graph-size width="212.99999999999955" height="190" xml:lang="zh_TW" />
      <plotEquation xml:lang="zh_TW">
        <math xml:lang="zh_TW">
          <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW" label-is-contextual="true" xmlns="http://schemas.mathsoft.com/math50">F</id>
        </math>
        <math xml:lang="zh_TW">
          <placeholder xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50" />
        </math>
      </plotEquation>
    </contourPlot>
  </plot>
</region>

等高線圖現在可以計算數據。