I wrote this under "Colours" tab on the first colour but it did not work. Not sure if I have to add an Aggr function before count? Secondly, where do I enter this formula, i.e., under "Colours" tab or "Expressions > Background colour"?
Finally, I am not able show the value of count (No:) on the bubbles. "Labels on Data Points" under "Presentation" tab is ticked but under Expression tab is deactive. How would I bring the data points. Any help is much appreciated!