Hi!
I have two different dataframes with the same number of entries. How can I copy one column of the dataframe 1 into the dataframe 2?
Many thanks!
Hi!
I have two different dataframes with the same number of entries. How can I copy one column of the dataframe 1 into the dataframe 2?
Many thanks!
I don’t know if there is a better way but I found a solution using Take:
auto nptsCol = df1.Take<int>("npoints");
auto df3 = df2.Define("npoints", [&nptsCol](ULong64_t iset){return nptsCol->at(iset);}, {"rdfentry_"});