From 79f449e19024508add1de3398714e207678edb0d Mon Sep 17 00:00:00 2001
From: Vinzent Steinberg <Vinzent.Steinberg@gmail.com>
Date: Tue, 16 May 2017 18:21:27 +0200
Subject: [PATCH] Improve README

---
 README.md | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 530e205..5033651 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,15 @@
 # average
 
 Calculate the average of a sequence and its error iteratively, using constant
-memory.
+memory and avoiding numerical problems. The calculation can be easily parallelized
+by using `Average::merge`.
 
 [Documentation](https://docs.rs/average) |
 [crates.io](https://crates.io/crates/average)
 
 [![Build Status](https://travis-ci.org/vks/average.svg?branch=master)](https://travis-ci.org/vks/average)
+
+## Advantages over naive calculation of average and variance
+
+* Avoids loss of precision due to cancellation.
+* Only needs a single pass over the samples, at the cost of a division inside the loop.