Difference between revisions of "FSRoot"
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(2) Make a plot of the eta' mass: | (2) Make a plot of the eta' mass: | ||
| − | root> FSHistogram::getTH1F("flat.root","ntFSGlueX_100_221","MASS(2,3,4,5,6)","")->Draw() | + | root> FSHistogram::getTH1F("flat.root","ntFSGlueX_100_221","MASS(2,3,4,5,6)","(80,0.8,1.2)","")->Draw() |
Revision as of 11:27, 10 December 2021
FSRoot is an alternative to DSelectors that uses flat trees.
There are two steps:
(1) Use FlattenForFSRoot (hd_utilities/FlattenForFSRoot/flatten) to generate flat trees from the standard analysis trees.
> flatten -in [name of an input ROOT file containing an analysis tree] -out [name of the output file containing the new flat tree]
Run flatten with no flags to see further run options. This should work for data, reconstructed MC, and thrown MC.
See the FlattenForFSRoot/Documentation directory for more information.
(2) Use FSRoot (available at https://github.com/remitche66/FSRoot) to make histograms from the flat trees.
See the FSRoot/Documentation directory for documentation.
Here is a working example:
(1) Flatten an analysis tree:
> flatten -in /u/home/remitche/FSRootExample/analysis.root -out flat.root
(2) Make a plot of the eta' mass:
root> FSHistogram::getTH1F("flat.root","ntFSGlueX_100_221","MASS(2,3,4,5,6)","(80,0.8,1.2)","")->Draw()
