thanks for adding that spline example into ScatterDraw. However there is one tidbit missing, it technically adds 2 series, which is OK, but also adds 2 legend lines when I want to show individual values, which is less OK. Is there a way how to get them combined?
To make it more clean, currently this is what I get with scatterdraw:
and this is what I want it to be (in the application, I am exporting the chart to .xlsx, so this is from the same testing graph...)