From 002a7b4d01e09b968ab2ffb0a9620becfacce139 Mon Sep 17 00:00:00 2001
From: kexinzhao <19hskevin87@gmail.com>
Date: Tue, 5 Dec 2017 15:18:05 -0800
Subject: [PATCH] fix scatter op equation (#6304)

---
 paddle/operators/scatter_op.cc | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/paddle/operators/scatter_op.cc b/paddle/operators/scatter_op.cc
index ce4b794bc35..573bbcd1875 100644
--- a/paddle/operators/scatter_op.cc
+++ b/paddle/operators/scatter_op.cc
@@ -87,10 +87,15 @@ class ScatterOpMaker : public framework::OpProtoAndCheckerMaker {
     AddInput("Updates", "The updated value of updates op");
     AddOutput("Out", "The output of add op");
     AddComment(R"DOC(
-Scatter Operator by selecting from the first axis,
+Scatter Operator.
 
-Out = Ref
+This operator obtains output by updating the input on selected indices on the first axis:
+
+$$
+Out = Ref \\
 Out[Index] = Ref[Index] + Updates
+$$
+
 )DOC");
   }
 };
-- 
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