Greetings

I'm working on a report to show employee attendance on meetings (based on time logs from zoho projects), when the employee hasn't attended a meeting (no timelog on task) there should be a blank left on the report on that task's point, but that's not happening, instead the entire task point is removed from the x-axis, i was told that i need to include some sort of filler data/null value at least to have that relation. how can i do this in zoho analytics?

check the screenshot, i need to have this result but on single employee reports only, how can i achieve this?

Thanks