grouping in bar chart

I'm trying to separate bars inside a bar chart into separate groups. Adjust the gap applies to all bars. How will I be able to achieve what I need? Please help and thanks

Hi mltong

Use empty series to display the gaps.

You can either:

- in your data table insert empty rows or columns in the place where you want the gaps. The chart will be created automatically with gaps in those places

-after the chart is created add empty series and position them.

It works, thank you.