From f227a4e88a51027040635d4db52db959d0ced69d Mon Sep 17 00:00:00 2001
From: Emily <macdonald.e17@gmail.com>
Date: Tue, 5 Oct 2021 16:20:25 -0500
Subject: [PATCH] Require combine package to run combine limits

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 2dbc760c..aff8bb2b 100644
--- a/README.md
+++ b/README.md
@@ -153,6 +153,8 @@ g++ -o cutflowFromNtuples cutflowFromNtuples.cc `root-config --cflags --libs`
 - The first argument is the region (0=TChiHH, 1=T5HH), second is the NLSP mass, third is a bool for a more detailed cutflow (breaking down filters etc).
 
 ## Making datacards
+You will need the combine package in your CMSSW_10_2_13/src/ area. Follow the instructions here: https://cms-analysis.github.io/HiggsAnalysis-CombinedLimit/
+
 Before making the datacards, you'll need to run `ALPHABET.cc` to create the necessary histograms, see above.
 You will also need to run all of the necessary signal systematic variations, or switch the bool at the top "runSysts" to False.