Plotting error bars
Quattro Pro lets you graphically express the potential error amount for each data point in a chart. Horizontal bars above and below a data point indicate the interval of values in which the exact coordinates of the data point may lie under the assumed amount of error.
You can plot Y-direction and X-direction error bars, depending on the chart type.
The error bars can be deleted when you no longer need them.
To plot Y-direction error bars |  |
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1.
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Click a chart, and click a chart series.
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2.
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Right-click the selected series, and click Series properties.
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3.
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Click the Error bars tab.
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4.
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In the Y direction area, click one of the following:
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Both
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Negative
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Positive
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5.
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Choose a method of calculating the error from the Error amount list box.
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For more information about calculating the error amount of the y-axis, see “Calculating error amounts.”
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To plot X-direction error bars | |
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1.
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Click a chart, and click a chart series.
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2.
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Right-click the selected series, and click Series properties.
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3.
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Click the Error bars tab.
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4.
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In the X direction area, click one of the following:
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•
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Both
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•
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Negative
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•
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Positive
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5.
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Choose a method of calculating the error from the Error amount list box.
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•
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For more information about calculating the error amount of the x-axis, see “Calculating error amounts.”
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To delete Y-direction error bars | |
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1.
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Click a chart, and click a chart series.
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2.
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Right-click the selected series, and click Series properties.
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3.
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Click the Error bars tab.
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4.
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In the Y direction area, click None.
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To delete X-direction error bars | |
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1.
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Click a chart, and click a chart series.
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2.
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Right-click the selected series, and click Series properties.
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3.
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Click the Error bars tab.
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4.
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In the X direction area, click None.
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