Package Exports

quartz-quartile-cruncher
quartz-quartile-cruncher/index.js

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Readme

quartz-quartile-cruncher

A lightweight Node.js utility to analyze arrays of numbers using statistical quartiles.

✨ Features

Calculate quartile boundaries: Q1 (25th percentile), Q2 (median), Q3 (75th percentile)
Divide data into 4 sorted quarters (Q1–Q4)
Includes helper functions: min, max, and average

📦 Installation

npm install quartz-quartile-cruncher

🚀 Usage

const stats = require('quartz-quartile-cruncher');

const numbers = [10, 20, 30, 40, 50, 60, 70, 80];

// Quartile Boundaries
console.log(stats.quartileBoundaries(numbers));
// => { Q1: 27.5, Q2: 45, Q3: 62.5 }

// Value-based Quartile Groups
console.log(stats.quarterly(numbers));
/*
[
  { quarter: 1, count: 2, values: [10, 20] },
  { quarter: 2, count: 2, values: [30, 40] },
  { quarter: 3, count: 2, values: [50, 60] },
  { quarter: 4, count: 2, values: [70, 80] }
]
*/

// Basic stats
console.log(stats.min(numbers));     // 10
console.log(stats.max(numbers));     // 80
console.log(stats.average(numbers)); // 45

📚 API Reference

`quartileBoundaries(array) ⇒ { Q1, Q2, Q3 }`

Returns the 25th, 50th, and 75th percentile of the sorted array.

`quarterly(array) ⇒ Array`

Returns an array of four objects { quarter, count, values[] } after sorting.

`min(array)`, `max(array)`, `average(array)`

Basic statistical helpers.