Johnni Winther
808fa4ca8b
Change-Id: I5b7348fb4adb4e7f4039c91d54d712c1eb131ecf Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/395002 Reviewed-by: Jens Johansen <jensj@google.com> Reviewed-by: Slava Egorov <vegorov@google.com> Commit-Queue: Johnni Winther <johnniwinther@google.com>
23 lines
763 B
Dart
23 lines
763 B
Dart
// Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import 'dart:math';
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double average(List<double> elapsedTimes) {
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return elapsedTimes.reduce((v, e) => v + e) / elapsedTimes.length;
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}
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double standardDeviation(double mean, List<double> elapsedTimes) {
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double numerator = 0.0;
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for (double elapseTime in elapsedTimes) {
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numerator += (elapseTime - mean) * (elapseTime - mean);
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}
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double stdDev = sqrt(numerator / (elapsedTimes.length - 1));
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return stdDev;
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}
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double standardDeviationOfTheMean(List<double> elapsedTimes, double stdDev) {
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return stdDev / sqrt(elapsedTimes.length);
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}
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