From 0d2a58409e3c9c4a1c77878555b93c8de36c1a01 Mon Sep 17 00:00:00 2001
From: Krishna Vedala <7001608+kvedala@users.noreply.github.com>
Date: Fri, 26 Jun 2020 08:14:50 -0400
Subject: [PATCH] include cstdlib for std::abs()

---
 numerical_methods/ordinary_least_squares_regressor.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/numerical_methods/ordinary_least_squares_regressor.cpp b/numerical_methods/ordinary_least_squares_regressor.cpp
index 614fdab9a..4761a6d96 100644
--- a/numerical_methods/ordinary_least_squares_regressor.cpp
+++ b/numerical_methods/ordinary_least_squares_regressor.cpp
@@ -10,6 +10,7 @@
  * \author [Krishna Vedala](https://github.com/kvedala)
  */
 #include <cassert>
+#include <cstdlib>  // for std::abs
 #include <iomanip>  // for print formatting
 #include <iostream>
 #include <vector>