Hi,
I don't understand what you want to visualize as scatter chart.
If you want one point for the number of cars and one for the number of people, you should use series (and take the length of the list you collect)
If you want one point at each step with (nb of cars, nb of people), something like this:
chart "DataScatter" type:scatter
{
data "people" value:{length(list(road) collect each.AADT),
length(list(road) collect each.AADT)} color: °green line_visible:false;
}
what did you get when it worked?
Philippe
(I don't think anything was changed in the chart data definition since scatter charts were introduced)