Hi Ludyvine, Yes, this is possible and simple. See example in $ROOTSYS/tutorials/copytree3.C In the loop on entries, simply recompute your new variable and fill the clone Tree. Rene Brun Ludyvine Morand wrote: > > Hello, > > I'm working with a TTree composed of one branch of a non basic type and > branches of type float. > I'd like to clone this TTree and change the contents of a previously > filled branch entry of type float. > Is there a way to do it ? > > Thanks. > > Ludyvine. > > -- > Ludyvine Morand > DAPNIA/SPhN - Bat 703 Piece 156 - Orme des Merisiers > CEA Saclay - 91191 Gif-sur-Yvette cedex - FRANCE > Tel : (33-1)01 69 08 87 19
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