From d2b133901a65244934eb642ec8e20c797efaf650 Mon Sep 17 00:00:00 2001
From: Bertrand <bertrand.horel@gmail.com>
Date: Fri, 19 Feb 2016 15:03:51 +0000
Subject: nettoyage du dépôt
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---
 src/stratified_sampling.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 src/stratified_sampling.cpp

(limited to 'src/stratified_sampling.cpp')

diff --git a/src/stratified_sampling.cpp b/src/stratified_sampling.cpp
new file mode 100644
index 0000000..c1c8dc1
--- /dev/null
+++ b/src/stratified_sampling.cpp
@@ -0,0 +1,13 @@
+#include "stratified_sampling.hpp"
+
+std::pair<double, double> mean_var( std::vector<double> r){
+    std::pair<double, double> p;
+    for(auto &x: r){
+        p.first += x;
+        p.second += x*x;
+    }
+    p.first /= r.size();
+    p.second /= r.size();
+    p.second -= p.first * p.first;
+    return p;
+}
-- 
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