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Learning Advanced Charting 20<br />

FIGURE 20.22<br />

Three options for dealing with missing data.<br />

To specify how to deal with missing data for a chart, choose Chart Tools ➪ Design ➪ Data ➪ Select Data.<br />

In the Select Data Source, click the Hidden and Empty Cells button. Excel displays its Hidden and Empty<br />

Cell Settings dialog box. Make your choice in the dialog box. The option that you choose applies to the<br />

entire chart, and you can’t set a different option for different series in the same chart.<br />

TIP<br />

Normally, a chart doesn’t display data that’s in a hidden row or columns. You can use the<br />

Hidden and Empty Cell Settings dialog box to force a chart to use hidden data.<br />

Adding error bars<br />

Some chart types support error bars. Error bars often are used to indicate “plus or minus” information that<br />

reflects uncertainty in the data. Error bars are appropriate only for area, bar, column, line, and XY charts.<br />

To add error bars, select a data series and then choose Chart Tools ➪ Layout ➪ Analysis >>Error Bars. This<br />

drop-down control has several options. You can fine-tune the error bar settings using the Format Error Bars<br />

dialog box. The types of error bars are<br />

n<br />

n<br />

Fixed value: The error bars are fixed by an amount that you specify.<br />

Percentage: The error bars are a percentage of each value.<br />

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