I know that the trees have the same number of entries. But I have no idea why the first column is always 416.325.
I am using ROOT 5.34/05. I know it’s an old version but I am not willing to upgrade this system to ROOT 6 because it requires a specialized compiler build.
If you try t->Draw(“Sum$(delE)”); you will see some strong peaks (so, apparently about 20000 of the first events in your tree belong to the same peak at around 416).
Furthermore, while there are strong peaks they do not always give the same number (there are small differences that should be expected). Whereas when I run the code with expanded precision I get:
Ok, I checked the text file and the last entries are different. I still don’t understand why the order is different in the interpreter but I guess this is solved.