Hello,
It seems the user guide on TTree draw has some errors.
root.cern.ch/root/htmldoc/guide … -ttreedraw
- In section: “14.20.7.1 Explanations:” and item 31. tree->Draw(“fTracks.fPoints[][] - fTracks.fVertex[][]”):
I think the code below:
fTracks[2].fPoints[0] - fTracks[1].fVertex[0]
fTracks[2].fPoints[1] - fTracks[1].fVertex[1]
// with fTracks[2].fNpoint==2
should be
fTracks[2].fPoints[0] - fTracks[2].fVertex[0]
fTracks[2].fPoints[1] - fTracks[2].fVertex[1]
// with fTracks[2].fNpoint==2
- Also in section “14.20.7.1 Explanations:” and item 33 and 34. I think the selection in 33 and 34 doesn’t mean what is written:
“The first command draws fPx for the range between 0.4 and -0.4”
Best,
Duong