stats_probability_utils 0.9.1

Calculate measures of central tendency, position and dispersion for grouped and ungrouped data.

Stats & Probability Utils

It's a dart library focused on solving statistical problems, includes functions to get Descriptive Stats for grouped and ungrouped data such as the following:

• Measures of Central Tendency -- Mode -- Mean (arithmetic, geometric, pondered) -- Median -- Max,Min
• Measures of Dispersion -- Range -- Variance (sample, population) -- Standard Deviation (sample, population)
• Measures of Position -- quartiles
• Frecuency Table

Install dependencies

1. Run pub get to install dependencies.

Example

// Instance Object
Stats stats = Stats([1, 1, 1, 2, 3, 4, 2, 5, 3, 6, 5, 4, 6, 5, 4, 6, 7, 3, 6, 7]);

// -------------------------------
// -- UnGrouped Data
// ------------------------------
// Measures of central Tendency
print(stats.min); // 1
print(stats.max); // 7
print(stats.summation); // 81
// [arithmeticMean, geometricMean, ponderedMean]
print(stats.getMean()); // [4.05, 3.44, 4.05]
// [ [element, frecuency], ... ]
print(stats.getFrecuencies()); // [[1, 3], [2, 2], [3, 3], [4, 3], [5, 3], [6, 4], [7, 2]]
print(stats.getMode()); // [6]
print(stats.getMedian()); // 4.0

// Measures of Dispersion
// [sample, population]
print(stats.getVariance()); // [3.94, 3.74]
// [sample, population]
print(stats.getStandardDeviation()); // [1.98,1.93]
print(stats.getRange()); // 6

// -------------------------------
// -- Grouped Data
// ------------------------------
// Measures of central Tendency
print(stats.getMeanOfGroupedData()); // 4.12
print(stats.getMedianOfGroupedData()); // 4.2
print(stats.getModeOfGroupedData()); // 6.2

// Frecuency Table
print(stats.getIntervalsBySturgesRule()); // 5
print(stats.getAmplitude()); // 1.2
Map<String, dynamic> groupedClassLimit;
List<Map<String, dynamic>> groupedTable = stats.getGroupedFrecuencyMap();

for (groupedClassLimit in groupedTable) {
print('Lower class limit: ${ groupedClassLimit['lowerClassLimit'] }');
print('Upper class limit: ${ groupedClassLimit['upperClassLimit'] }');
print('Mid point (Xi): ${ groupedClassLimit['midpoint'] }');
print('Absolute frecuency (Fi): ${ groupedClassLimit['absoluteFrecuency'] }');
print('Accumulated Relative frecuency (Fr): ${ groupedClassLimit['accumulatedRelativeFrecuency'] }');
print('Accumulated frecuency (F): ${ groupedClassLimit['accumulatedFrecuency'] }');
print('XiFi: ${ groupedClassLimit['XiFi'] }');
}

// Measures of Dispersion
// [sample, population]
print(stats.getVarianceGrouped()); [3.77, 3.58]
print(stats.getStandardDeviationGrouped()); // [1.94, 1.89]

// Measures of Position
// [q1,q2,q3]
print(stats.getQuartiles()); [2.5,4.0,6.0]

License

GNU General Public License v3.0

Open source licenses

Dart Decimals

Copyright (c) 2013, Alexandre Ardhuin

https://github.com/a14n/dart-decimal

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.