Mysterious dark lines with multigraph?

[alberto.paniate]

Hi i have three graphs and i’m trying to put them together with Multigraph but with the last graph root draws this black line ? Why?
For example:

mg->Add(gi1V,“lp2”);
mg->Add(gi2V,“lp3”);
mg->Add(gi3V,“lp0”);

Root draws the black line over gi3V
while if i write :

mg->Add(gi1V,“lp2”);
mg->Add(gi3V,“lp3”);
mg->Add(gi2V,“lp0”);

root will draw the black line over gi2V

Thanks

[couet]

It is hard to tell without having a running macro reproducing this, but seems to me this is simply the graph points drawn with a circle marker. This graph seems to have many points close to each-other, therefore the markers touch eachother and draw this “thick line”.

[alberto.paniate]

No, root connects the points with lines and i don’t know why. This happens only in the multigraph and not in the single graph .

[couet]

We need a script reproducing de problem.

[alberto.paniate]

script of the macro or graph?

[couet]

The macro. Something we can run.

[alberto.paniate]

transistor.c (9.0 KB)

[couet]

At the end do:

   mg->Add(gi3V,"lp");
   mg->Add(gi4V,"lp");
   mg->Draw("AP");

[alberto.paniate]

What material would you like your statue ?

[couet]

It was simple. No statue needed :-). I am happy it works for you.

[alberto.paniate]

Can you explain me why lp1 or lp2 changes the lines ?

[couet]

Yes sure. You invoked the options described here:
https://root.cern/doc/master/classTGraphPainter.html#GP03
i.e. drawing the errors as band .

[alberto.paniate]

ok thank you very much