ROOT Version: 6.26.10
Platform: linux via ubuntu
Hi to everyone
I try to run this code but when i run it,This error is displayed:
How can I solve this?
At least: std::vector<...> *mmOnTrackNStrips = 0;
Attach the output of: tree->Print();
After the “tree->GetEntry(i);” line, add:
if (!(mmOnTrackNStrips && mmOnTrackNStrips->size() > 0)) continue; // just a precaution
You need to check the “mmOnTrackNStrips” branch.
What should I check?
Find the line which contains “*Br ... : mmOnTrackNStrips : ... *”
I mean find it in the output of “tree->Print();”.
Looks good.
With my “precaution”, do you still get a segmentation violation?
BTW. The “SetBranchStatus” usually uses 0 / 1, not false / true (but it probably doesn’t matter).
I am sorry.My wrong.It is filled.But why the entries is smaller than 43840?
I guess the “size” is 0 for some entries.
How can i change that?Because i want all entries
You need to ask the one who created this tree about what it contains.
Actually, if you look at the output of the “tree->Print();”, you can see that it has 43840 entries, so you do get all of them.
Maybe you want:
if (!mmOnTrackNStrips) continue; // just a precaution
for (unsigned j = 0; j < mmOnTrackNStrips->size(); j++) hist->Fill(mmOnTrackNStrips->at(j));
BTW. In the end of you routine, you should at least: tree->ResetBranchAddresses(); // disconnect from local variables
Now it show me again segmentation violation
Attach your source code for inspection.
hits_function_thita.C (1.4 KB)