I would like to plot on QGIS these coordinates using a different color for the individuals and a different size of the symbol when the same individual is detected in the same zone (same coordinates). I can give different colors to the individuals using the command: double click on the layer-->style-->"categorized". But I can't find out how to give different size to the symbols.
For example, the individual Gen26 is detected in the same position 4 times (Ua8546, Ua8547, Ua8552, Ua8559), and in another position twice (Ua8542, Ua8543). I would like to give bigger dimensions to the symbol when is detected 4 times than when is detected twice; of course, maintaining the same color for each individual.
@she_weeds and @kazuhito, I've found a problem: the method seemed to work but saw one thing. The points are different in colors depending on individuals, also the points seem to have different sizes depending on frequency of occurrence BUT one individual detected only once in a point has the same size (big) of another individual detected different times in the same point. I've simplified (and modified) the dataset I posted one week ago
Gen20 has the same dimensions of Gen16, but Gen16 is detected 5 times in that position, whereas Gen20 once. I used this function:
I'm sorry, I thought it worked but I can't understand how to solve this problem (I tried in these days to solve, but nothing).
Hoping in your another magic answer