範例：轉換繪圖的單位

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範例：轉換繪圖的單位

變更軸運算式的單位。

1. 使用單位定義值域變數與函數。

2. 將函數繪製成圖。

不論輸入的單位為何，刻度線值都會以您使用的單位系統之基本單位進行顯示。

3. 從單位佔位符號刪除公尺縮寫 m，再於空的佔位符號中插入英吋縮寫 in，變更 y 軸運算式的繪製單位。

4. 重新繪製相同的函數，但這一次在單位佔位符號中新增比例係數，而不是轉換單位。

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          <traceStyle color="#FF008000" symbol="x" line-weight="1" line-style="Solid">線條</traceStyle>
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            <gridLabels display="true" />
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          <axisLabel />
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              <math>
                <placeholder xmlns="http://schemas.mathsoft.com/math50" />
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        <yAxis rank="1" legend-position="PlotBoundaryLeft" start="0" end="200">
          <axisLine position="ticknumberlock" positionticmark="0" legendWidth="136.416666666667" />
          <axisGrid>
            <gridFrequency>11</gridFrequency>
            <gridLabels display="true" />
            <gridLines />
            <tickMarks display="true" />
          </axisGrid>
          <axisLabel />
          <markers />
          <plotEquations>
            <plotEquation>
              <math>
                <apply xmlns="http://schemas.mathsoft.com/math50">
                  <id xml:space="preserve">dist</id>
                  <id xml:space="preserve">x</id>
                </apply>
              </math>
              <math>
                <id labels="UNIT" xml:space="preserve" xmlns="http://schemas.mathsoft.com/math50">in</id>
              </math>
            </plotEquation>
            <plotEquation>
              <math>
                <apply xmlns="http://schemas.mathsoft.com/math50">
                  <id xml:space="preserve">dist</id>
                  <id xml:space="preserve">x</id>
                </apply>
              </math>
              <math>
                <apply xmlns="http://schemas.mathsoft.com/math50">
                  <scale />
                  <real>0.1</real>
                  <id labels="UNIT" xml:space="preserve">m</id>
                </apply>
              </math>
            </plotEquation>
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          <xyDomain scale-type="linear" auto-scale="true">
            <startValue>
              <placeholder xmlns="http://schemas.mathsoft.com/math50" />
            </startValue>
            <endValue>
              <placeholder xmlns="http://schemas.mathsoft.com/math50" />
            </endValue>
          </xyDomain>
        </yAxis>
      </axes>
    </xyPlot>
  </plot>
</region>

這些繪線代表對等的數字。例如，第一條繪線上的第二個點位在 79 英吋 = 2 公尺。在第二條繪線上則為 20 * 0.1 m = 2 公尺。

5. 插入兩個水平標記，標示以上兩個數據點。

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            <gridLabels display="true" />
            <gridLines />
            <tickMarks display="true" />
          </axisGrid>
          <axisLabel />
          <markers />
          <plotEquations>
            <plotEquation>
              <math>
                <id xml:space="preserve" xmlns="http://schemas.mathsoft.com/math50">x</id>
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              <math>
                <placeholder xmlns="http://schemas.mathsoft.com/math50" />
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            </plotEquation>
          </plotEquations>
          <xyDomain scale-type="linear" auto-scale="true">
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            <marker resultRef="19" display="true" color="#FF800080" line-style="Dot" line-weight="2" value="79">
              <real xmlns="http://schemas.mathsoft.com/math50">79</real>
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            <plotEquation>
              <math>
                <apply xmlns="http://schemas.mathsoft.com/math50">
                  <id xml:space="preserve">dist</id>
                  <id xml:space="preserve">x</id>
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              <math>
                <id labels="UNIT" xml:space="preserve" xmlns="http://schemas.mathsoft.com/math50">in</id>
              </math>
            </plotEquation>
            <plotEquation>
              <math>
                <apply xmlns="http://schemas.mathsoft.com/math50">
                  <id xml:space="preserve">dist</id>
                  <id xml:space="preserve">x</id>
                </apply>
              </math>
              <math>
                <apply xmlns="http://schemas.mathsoft.com/math50">
                  <scale />
                  <real>0.1</real>
                  <id labels="UNIT" xml:space="preserve">m</id>
                </apply>
              </math>
            </plotEquation>
          </plotEquations>
          <xyDomain scale-type="linear" auto-scale="true">
            <startValue>
              <placeholder xmlns="http://schemas.mathsoft.com/math50" />
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        </yAxis>
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</region>

刻度線與標號說明值為無單位。只有軸運算式可以使用單位。

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