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Reference Guide
 
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IO tutorials

These tutorials illustrate some of the capabilities of the ROOT IO subsystem.

Files

file  copyFiles.C
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Example of script showing how to copy all objects (including directories) from a source file.
 
file  dirs.C
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This macro illustrates how to create a hierarchy of directories in a Root file.
 
file  double32.C
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Tutorial illustrating use and precision of the Double32_t data type You should run this tutorial with ACLIC: a dictionary will be automatically created.
 
file  fildir.C
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This macro displays the ROOT Directory data structure
 
file  file.C
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This macro displays the physical ROOT file structure
 
file  float16.C
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Tutorial illustrating use and precision of the Float16_t data type.
 
file  hadd.C
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Macro to add histogram files This macro is kept for didactical purposes only: use instead the executable $ROOTSYS/bin/hadd !
 
file  importCode.C
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Example of script showing how to create a ROOT file with subdirectories.
 
file  loopdir.C
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Example script to loop over all the objects of a ROOT file directory and print in Postscript all the TH1 derived objects.
 
file  loopdir11.C
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Example script to loop over all the objects of a ROOT file directory and print in Postscript all the TH1 derived objects.
 
file  mergeSelective.C
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Merge only part of the content of a set of files.
 
file  readCode.C
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Example of script showing how to navigate in a ROOT file with sub-directories and read the objects in each sub-directory.
 
file  testMergeCont.C
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Macro demonstrating the merging of containers.
 
file  testTMPIFile.C
 This macro shows the usage of TMPIFile to simulate event reconstruction and merging them in parallel.