Let’s say that you have created a chart in Google Sheets. Apart from showing the chart only to the viewers, you want to show the percentage by which they have missed something.

The next step is to tell Logger Pro that you want to use the "error" column as the uncertainty for the y-column. Double click on the y-column in the data set (at the top).

You can make a bar graph in Excel by first selecting the range you want to depict, and then using the dropdown menu to select the desired chart.