X error bars indicate error along the x axis in scatter, line, bar, and QC graphs. Y error bars indicate error along the y axis in scatter, line, column, and QC graphs.
Step 1
Select a graph to which you want to add error bars.
Step 2
Choose X Error Bars or Y Error Bars from the Options menu.
Step 3
In the upper-left corner of the Error Bars dialog, select the data series to which you want to apply error bars.
• To select a single series, click it.
• To select consecutive series, select the first series in the range, then Shift-click the last series in the range.
• To select non-consecutive series, Cmd-click each series.
Step 4
In the Bar Attributes area, choose an error bar color, width, separation, and cap length from the pop-up menus.
Step 5
Choose the type of error bars you want to display (Both Errors, Positive Error or Negative Error) from the pop-up menu at the top of the dialog.
Step 6
Choose a source of error from the Source of Error pop-up menu.
• To remove error bars, choose None.
Step 7
If you choose n% of Coordinate, Fixed % of n, or Error to n as the source of error, enter a value for n next to n=.
• If your source of error is a data window, select a column of data.
Step 8
Click the Show button to preview the error bars, then click OK.
