How to select some data from rows of one column and push them in one vector?

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ROOT Version: 6.30
Platform: win10
Compiler: vc++ 2022
___How to select some data from rows of one column and push them in one vector?

2

Hi @songshusen,

thanks for reaching out! Can you give some context? Are you using RDF?

Cheers,
Monica

3

If you’re using RDF, you can do something like this:

  //get the events
  auto col = df.Take< mycolumn_type>("mycolumn");
  std::vector< mycolumn_type > vec;
  for(int e = 0; e < col->size() ; e++) vec.push_back(col->at(e));
4

I am not using RDF.
I want to push the data into vector because I can use the iterator to treat the data.

5

Can you specify what you’re using? Can you provide a small code snippet?

6

I see you do it by RDF.
I think this is good answer, I will do like this.
Thanks.