P K - 2017-02-01

Firstly i must apologise if there is a similar question that i could not find.

What i am trying to accomplish is creating a graph with currently 3 lines, with about 6000 points accross the x line.
I am using the function $plot->SetYDataLabelType('custom', 'callback', $dataArray); for displaying the labels if i find them necessary. So al works fine until so far, but when i am returning the label in the callback function, the label gets plotted foreach line at that point. So the labbeling gets a little messed up.

I was hoping that you guys could help me to specificy which line i could label, instead of all of them at this point.

Thanks so far!