From 2cf01eb4d9dd923602f5ce16b18a1ad401ca874d Mon Sep 17 00:00:00 2001
From: Ulrich Hetmaniuk <ulrich.hetmaniuk@ng-analytics.com>
Date: Thu, 5 Aug 2021 21:50:56 -0600
Subject: [PATCH] Add comments

---
 example/wiki/sparse/KokkosSparse_wiki_bsrmatrix.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/example/wiki/sparse/KokkosSparse_wiki_bsrmatrix.cpp b/example/wiki/sparse/KokkosSparse_wiki_bsrmatrix.cpp
index 6cda8e23b6..c6025be3a8 100644
--- a/example/wiki/sparse/KokkosSparse_wiki_bsrmatrix.cpp
+++ b/example/wiki/sparse/KokkosSparse_wiki_bsrmatrix.cpp
@@ -76,6 +76,19 @@ int main() {
 
   Ordinal numRows = 10;
 
+  //
+  // This code will generate a tri-diagonal matrix
+  //
+  // [ 1  -1  0 ....... 0 ]
+  // [ -1  2  -1  0 ... 0 ]
+  // [        ...         ]
+  // [ 0 ... 0  -1  2  -1 ]
+  // [ 0  .....  0  -1  1 ]
+  //
+  // The matrix will be stored as `KokkosSparse_CrsMatrix` (10 x 10 matrix).
+  // Then we will construct a `KokkosSparse_BsrMatrix` with block size 2.
+  //
+
   {
     const Offset numNNZ = 2 + (numRows - 2) * 3 + 2;
     typename row_map_type::non_const_type row_map("row pointers", numRows + 1);