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--- snowmass2013:analyse_d3 [2013/06/01 02:48] – asc
+++ snowmass2013:analyse_d3 [2014/04/24 01:51] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
 [[snowmass2013:montecarlo| <<back]]
-=== How to analyze in C++ ===
+==== How to analyze in C++ ====
-This example shows how to run a program over all files in a certain directory, fill histograms (pT and jet mass) and
+This example shows how to run a C+= program over all Delphes ROOT files located in  a certain directory, fill histograms (pT and jet mass) and save them in an output ROOT file.
-save histograms in an output ROOT file.
 Look at the workbook of Delphes3 [[https://cp3.irmp.ucl.ac.be/projects/delphes/wiki/WorkBook| Delphes3 workbook]].
@@ Line 17: / Line 16: @@
-=== Advanced  Delphes3 example  ===
+==== Advanced C++ example  ====
 This assumes that Delphes3 is already installed. You have the directory "Delphes3" with the shared file "libDelphes.so" inside.
@@ Line 67: / Line 66: @@
 But before you do this, you will need to set "DATA_DIR" variable inside "A_RUN_TEST" to navigate to the directory with your "ROOT" files.
-=== How to analyze in PyROOT ===
+==== How to analyze in PyROOT ====
-If ROOT was compiled using "python" option, you can use PyROOT to loop over events. Here is a small example to plot transverse moment of electrons (based on the original code of Peter Onyisi with some modifications):
+If ROOT was compiled using "python" option, you can use PyROOT to loop over events. Here is a small example to plot transverse moment of electrons (based on the original code of Peter Onyisi, with some modifications, see
+[[https://indico.cern.ch/getFile.py/access?contribId=5&resId=0&materialId=slides&confId=255032| his talk]]):
-<code python>
+<code python test.py>
 #!/usr/bin/env python
 # Based on P.Onyisi example
@@ Line 86: / Line 86: @@
 t=f.Delphes # extract the tree
 h=TH1D('ele','Electron #eta',8,-4,4) # initialize a histogram
-c=TCanvas() # build a canvas
+c1=TCanvas() # build a canvas
 n=0
@@ Line 98: / Line 98: @@
 if (raw_input("Press any key to exit") != "-9999"):
     c1.Close(); sys.exit(1);
+</code>
+Run this code as:
+<code>
+python test.py file.root
 </code>
+You will see this image:
+{{:snowmass2013:screenshot_from_2013-05-31_21_55_04.png?200|}}
+====How to analyze in Java====
+MC truth information and most of ROOT files with Delphes outputs
+ are stored in the PROMC file format which can be analyzed on any platform.
+Read this [[snowmass2013:analyse_d36_promc| this section]].
  --- //[[[email protected]|Sergei Chekanov]] 2013/03/13 10:23//