You can add error bars to your graphs in Grapher to display error values defined by more than one parameter. Follow these steps to add error bars to a plot:

1. In the Object Manager, select your plot.
2. In the Property Manager, click the Error Bars tab.
3. Change the Direction to Vertical, Horizontal, or Vertical and Horizontal.
4. If you wish for the error bars to be drawn in front of the plot, uncheck Draw behind plot.
5. Set the error bar properties in the General section. If you have selected Vertical and Horizontal, the properties being displayed in the General section are for the direction selected in the Properties to edit field.

Line Scatter plot with positive and negative error bars.

To fill between the error bars, you can click the Fill tab and change the Pattern under Vertical (or Horizontal) Error Bar Connection Fill, to whatever fill pattern you would like. 

Line Scatter plot with displaying fill between connected error bars.

To learn more about error bars in Grapher, please see the Grapher Help entry Error Bars.

Updated March 2023