Smoothing out a TGraph plot

Newbie
1

Dear experts,

I’m trying to figure out if I can “smooth” a curve of a TGraph line that is plotted on a TH2D frame. I know that in the histogram itself, I can change the number of bins, but this doesn’t affect the TGraph.

As I am limited by the number of coordinates (x,y) that I’m reading into my graph, I cannot just add more data points to achieve “smoothness.”

I would appreciate any advice you might have on this matter. Thank you.

ROOT Version: 6.14/04
Built for macosx64
From tags/v6-14-04@v6-14-04
(I use MacBookAir.)

2

Hi @obitter16, welcome on the ROOT forum.

When drawing the graph you can use the “C” option.

gr->Draw("ac");

For other options look here.

Cheers,
Stefano

3

Hi Stefano,

Thank you so much! Yes, my TGraph is plotted much smoother now.

Cheers,
Olivia

4

Be careful with option C. It might produce artefact when the graph points vary a lot.