The TColorGridSeries is very useful to plot data of a wind profiler, e.g. to visualize windspeed or direction in different heights. But there are some problems using TColorGridSeries: The OnClickSeries event is not fired for data with the highest Z value, that is at clicking into the most upper "lin...

Hello Yeray, Thank you for your answer. Indeed I am using the OnGetMarkText event to display some additional information that is stored in an external data array. Therefore I needed the correct ValueIndex. By setting XValues.Order to loNone all values will remain at their original positions. By the ...

Ok, meanwhile I have found out, that after creating a series the XValueList is sorted automatically.
By setting everything works fine.

Hi! To plot a time series of wind vectors I use TArrowSeries (see attached sample). In order to point the arrowhead always to the respective time on the x-axis I draw the arrow inverted: AddArrow(x+dx,y+dy,x,y) Unfortunately the OnGetMarkText event delivers wrong value for ValueIndex because it is r...

Hello Mark,

this seems to be an interesting approach, I will continue to work with it.
To calculate the correct length of the arrows I think I have to convert it to pixel size (depending on the screen resolution).

Thanks for the tip.

Best regards
jradke

Hi, is it possible to create a wind vector plot similiar to the attached picture? Each arrow in the picture represents the wind speed and wind direction at a given time and height. I tried a little bit using the TArrowSeries, but I did not get a satisfactory solution. Has anyone good ideas for that ...