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     Geant4 - an Object-Oriented Toolkit for Simulation in HEP
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                            ExampleR01
                            ----------

This directory contains a GEANT4 example that demonstrates how to
create and save histograms and ntuples in an HBOOK-compatible format.

The ExR01Histograms class uses CLHEP 1.4.0, with whatever features and
limitations are present in that class library.  It doesn't have all the
bells and whistles of Root (or even HBOOK4), but it lets you create
histograms and ntuples that you can manipulate with PAW.

This simple example is based on examples/extended/E01 in the Geant 4.0.1
distribution, and does almost the same thing: Random numbers are
generated from a Gaussian distribution using two different CLHEP engines, 
and then...

-- The random number from the James engine is accumulated in a 1-dimensional
   histogram.

-- The random numbers from the James engine and the Rand48 engine are
   accumulated into a 2-dimensional histogram.

-- The two random numbers are stored in a row in an ntuple.


At present, the GNUMakefile included with this example will only work properly
with libraries compiled with the g++ compiler.


Bill Seligman 2-Sep-1999 (seligman@nevis1.columbia.edu)
