How to add scatter plot to xtline and modify its colours accordingly

[Marco Kuehne]

Hi, I'm trying to add orginial data to xtline. Sometimes a unit exhibits a constant variable over severals years, and here I want to distinguish whether a flat line is due to, say 5 consecutive same values or due to only 2 same values with 3 gaps in between. I managed to code something like this in another software. For the green case, there are 3 years data for 5 year with gaps in between.

How can I finally modify the colour of data points? Sometimes data overlaps, and I need colour to distinguish between cases. I also don't need the additional var-label in the legend, which is created automatically. Here is some similar MWE:

clear
input     year     pid var
        2003     513 1500    
        2004     513 1550
        2005     513 1500    
        2006     513 1600    
        2003     514 1600    
        2004     514 1600
        2005     514 1700    
        2006     514 1800            
end
xtset pid year
xtline var, overlay addplot(scatter var year)

Best regards

[Nick Cox]

Some ideas at https://www.statalist.org/forums/for...using-linkplot