Set energy 0 in a sum

ROOT
22

I am not sure I understand what you would like to get exactly. I just showed the working syntax. Now you should use and set the cut in the appropriate way to perform the selection you need.

23

Hi @couet, I mean:
If plot whitout cut3sub and cut3sub2 conditions I get 1899 events.
Plotting with cut3sub and cut3sub2 conditions I get only 12 events.

I need that ROOT doesn’t delete the events but sets energy=0 for all not fullfilling events. Then I must have 1899 events, not just 12…
By using your code I get only 12 events…

24

That’s the principle of a a selection. When you apply cuts you get less events.

25

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26

I see you open an other post. with the question 'is there a way to do what i need to"… can you be more clear ?