TangHuLu Chart

TangHuLu is a traditional Chinese snack of candied fruit normally sugar-coated hawthorns on a stick.

TangHuLu chart uses a string of bubbles to visualise the joint probability between two integer/categorical random variables. The size of circle is proportional to the joint probability, the blue coloured circle is in the credible set of given a probability threshold default to 0.95, the red is in the set not in the credible set. The tile background is coloured if there is any circle, in case the very small circle wouldn't be missed out. The coloured background can also show the area of the credible set and non-credible set.