Data Visualization to Show Deviations/Variations compared with a reference point Using Python

Variations, be it positive or negative, are compared with a reference point, which is usually zero. However, reference points can also be a target or a long-term average. 
1) Diverging Bar Chart
2) Diverging Dot Plot
3) Diverging Lollipop Chart

[shaam]

Great training material and very useful, thanks.

[shaam]

Try better microphone, sound quality needs improvement and amplification