Hello, What would be the recommended way for drawing a variable in one tree vs. a variable in another tree (assuming that the number of entries is the same for each branch) ? For instance I have the following file with trees "IEM_EXP_Valid_Tree" located in both subdirectory "inc20" and "inc40". I would like issue a command similar to Draw("t1.rms":"t2.rms") where t1 is tree "inc20/IEM_EXP_Valid_Tree" and t2 is tree "inc40/IEM_EXP_Valid_Tree". --------------file listing ------------------------------------------------------------------------- TFile** IEM2.root TFile* IEM2.root TDirectory* inc20 inc20 OBJ: TTree IEM_EXP_Valid_Tree Validity Domain - Exponential IEM : 0 KEY: TTree IEM_EXP_Valid_Tree;1 Validity Domain - Exponential IEM TDirectory* inc40 inc40 OBJ: TTree IEM_EXP_Valid_Tree Validity Domain - Exponential IEM : 0 KEY: TTree IEM_EXP_Valid_Tree;1 Validity Domain - Exponential IEM Thanks in advance for any help. Malcolm <>------------------------------------------------<> Malcolm W. J. Davidson CESBIO - UMR 5639 CNES-CNRS-UPS 18 Avenue Edouard Belin BP 2801 F-31401 Toulouse Cedex 4 France e-mail : davidson@cesbio.cnes.fr phone (33)(0)5.61.55.85.84 fax (33)(0)5.61.55.85.00 <>------------------------------------------------<>
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