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+# RegressionTreeProducer </br>
+Simple flat tree for energy corrections </br>
+
+======= Steps for Run 3 - for 2023 operation (cross-check) ===================
+```
+cmsrel CMSSW_12_6_3
+cd CMSSW_12_6_3/src
+cmsenv
+git clone https://github.com/hatakeyamak/RegressionTreeProducer.git -b PFTree_12_6_X
+scram b -j8
+```
+See: https://codimd.web.cern.ch/IwKw1T6VQw6Q8mHpvK3Mzw?view for further details.
+
+======= Steps for Run 3 V0 - for 2022 operation ===================
+```
+cmsrel CMSSW_12_0_0
+cd CMSSW_12_0_0/src
+cmsenv
+git clone https://github.com/hatakeyamak/RegressionTreeProducer.git -b Run3V0_12_0_X
+scram b -j8
+```
+
+======= Steps for Run 3 V0 - for simple tests ===================
+```
+cmsrel CMSSW_11_3_2
+cd CMSSW_11_3_2/src
+cmsenv
+git clone https://github.com/jainshilpi/RegressionTreeProducer.git -b Run3V0_11X
+scram b -j8
+```
+
+======= Steps for 2018 UL release===================
+```
+cmsrel CMSSW_10_5_0
+cd CMSSW_10_5_0/src
+cmsenv
+git clone https://github.com/jainshilpi/RegressionTreeProducer.git -b PFUL2018
+scram b -j8
+```
+
+======= Steps for 2017 UL release===================
+```
+cmsrel CMSSW_10_5_0
+cd CMSSW_10_5_0/src
+cmsenv
+git clone https://github.com/jainshilpi/RegressionTreeProducer.git -b PF2017UL
+scram b -j8
+```
+
+======= Steps for 10X release===================
+```
+cmsrel CMSSW_10_0_3
+cd CMSSW_10_0_3/src
+cmsenv
+git clone https://github.com/jainshilpi/RegressionTreeProducer.git -b flatTree_2018
+scram b -j8
+```
+
+======= Steps for 9X release===================
+```
+cmsrel CMSSW_9_4_0_patch1
+cd CMSSW_9_4_0_patch1/src
+cmsenv
+git clone https://github.com/jainshilpi/RegressionTreeProducer.git -b flatTree_2018
+scram b -j8
+```