Using column-wise ntuples

As mentioned in xxx, the method used write to root used in sgvuser.F95 works for histograms and row-wise ntuples, but not for column-wis ones. In SGV_DIR/samples, the program sgvopt.F95 contains an example on how to use column-wise ntuples. Copy this program to your private area, and compile it with

cresgvexe merge sgvopt

(possiby adding any generator-selecting -D-flag as argument 3). Make sure that the directive CWN is set to .TRUE. in the steering file (NOT the default), and that USE_HISTOS is .TRUE. (which is the default). Also make sure that fort.99 is NOT linked to an exsisting root-file: root becomes very upset if that would be the case. The root-tree created and filled by running sgvopt.exe is a quite complete set of the information SGV has about the event, both true and seen, also containing high-level objects like jets and fitted vertecies. sgvopt.F95 is therefor either already sufficient for your root-based analysis or a good starting-point for developpment.