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dart_statistics 0.0.2
dart_statistics: ^0.0.2 copied to clipboard

A stats library translated from the npm javascript packages chi-squared-test, chi-squared, and gamma

A dart library for statistics

## Usage #

A simple usage example:

```
import 'package:dart_statistics/dart_statistics.dart';
void main() {
// We expect a fair die
final expected = <double>[2, 2, 2, 2, 2, 2];
// Looks pretty unfair...
final observed = <double>[6, 3, 3, 0, 0, 0];
// Reduction in degrees of freedom is 1, since knowing 5 categories determines the 6th
final reduction = 1;
var probability = chiSquaredTest(
observed,
expected,
degreesOfFreedomReduction: reduction,
).probability;
print(probability);
assert(probability == 0.010362);
// Gives 0.010362, which indicates that it's unlikely the die is fair
// However, something a little more likely
observed.clear();
observed.addAll([1, 2, 4, 4, 2, 1]);
probability = chiSquaredTest(
observed,
expected,
degreesOfFreedomReduction: reduction,
).probability;
print(probability);
assert(probability == 0.414881);
// Gives back 0.415881, which is indicates that they did come from the same distribution (by most statistical standards)
}
```

## Features and bugs #

Please file feature requests and bugs on github, I will gladly accept pull requests and changes, this is not a library that I'm actively developing. If anyone would like to take over the library that is also fine.