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#149 improve accuracy of getFastAverage()

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RobTillaart 2020-04-16 12:56:15 +02:00
parent 7d77ca1216
commit 6e867f06aa
6 changed files with 16 additions and 27 deletions
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6
LICENSE.md
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@ -1,7 +1,7 @@
MIT License
# MIT License
Copyright (c) 2010-2018 Rob Tillaart
Copyright (c) 2010-2020 Rob Tillaart
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
@ -19,4 +19,4 @@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
SOFTWARE.

11
libraries/RunningAverage/RunningAverage.cpp
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@ -1,7 +1,7 @@
//
// FILE: RunningAverage.cpp
// AUTHOR: Rob Tillaart
// VERSION: 0.2.15
// VERSION: 0.2.16
// DATE: 2015-July-10
// PURPOSE: RunningAverage library for Arduino
//
@ -30,6 +30,7 @@
// refactored a bit; marked some TODO's; all function names to camelCase
// 0.2.14 - 2020-01-15 added getValue(n) to retrieve elements in order of addition - see issue #132
// 0.2.15 - 2020-01-17 fix overflow in getValue - see issue #139
// 0.2.16 2020-04-16 improve _sum - see issue #149 (bourkemcrobbo)
//
// Released to the public domain
//
@ -89,16 +90,16 @@ void RunningAverage::addValue(const float value)
}
// returns the average of the data-set added sofar
float RunningAverage::getAverage() const
float RunningAverage::getAverage()
{
if (_cnt == 0) return NAN;
float sum = 0;
_sum = 0;
for (uint8_t i = 0; i < _cnt; i++)
{
sum += _ar[i];
_sum += _ar[i];
}
return sum / _cnt;
return _sum / _cnt;
}
float RunningAverage::getFastAverage() const

6
libraries/RunningAverage/RunningAverage.h
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@ -1,7 +1,7 @@
//
// FILE: RunningAverage.h
// AUTHOR: Rob.Tillaart@gmail.com
// VERSION: 0.2.15
// VERSION: 0.2.16
// DATE: 2016-dec-01
// PURPOSE: RunningAverage library for Arduino
// URL: https://github.com/RobTillaart/Arduino/tree/master/libraries/RunningAverage
@ -17,7 +17,7 @@
#ifndef RunningAverage_h
#define RunningAverage_h
#define RUNNINGAVERAGE_LIB_VERSION "0.2.15"
#define RUNNINGAVERAGE_LIB_VERSION "0.2.16"
#include "Arduino.h"
@ -33,7 +33,7 @@ public:
void fillValue(const float, const uint8_t);
float getValue(const uint8_t);
float getAverage() const; // iterates over all elements.
float getAverage(); // iterates over all elements.
float getFastAverage() const; // reuses previous values.
// return statistical characteristics of the running average

14
libraries/RunningAverage/keywords.txt
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@ -1,17 +1,9 @@
#######################################
# Syntax Coloring Map For RunningAverage
#######################################
#######################################
# Datatypes (KEYWORD1)
#######################################
RunningAverage KEYWORD1
#######################################
# Methods and Functions (KEYWORD2)
#######################################
clear KEYWORD2
addValue KEYWORD2
getAverage KEYWORD2
@ -29,13 +21,7 @@ getMinInBuffer KEYWORD2
getMaxInBuffer KEYWORD2
getValue KEYWORD2
#######################################
# Instances (KEYWORD2)
#######################################
#######################################
# Constants (LITERAL1)
#######################################
RUNNINGAVERAGE_LIB_VERSION LITERAL1

2
libraries/RunningAverage/library.json
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@ -15,7 +15,7 @@
"type": "git",
"url": "https://github.com/RobTillaart/Arduino.git"
},
"version": "0.2.15",
"version": "0.2.16",
"frameworks": "arduino",
"platforms": "*",
"export": {

4
libraries/RunningAverage/library.properties
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@ -1,5 +1,5 @@
name=RunningAverage
version=0.2.15
version=0.2.16
author=Rob Tillaart <rob.tillaart@gmail.com>
maintainer=Rob Tillaart <rob.tillaart@gmail.com>
sentence=The library stores the last N individual values in a circular buffer to calculate the running average.
@ -7,3 +7,5 @@ paragraph=Supports min max average
category=Data Processing
url=https://github.com/RobTillaart/Arduino/tree/master/libraries/
architectures=*
includes=RunningAverager.h
depends=