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import { mean } from './AverageMean.js'

/**

*@function meanAbsoluteDeviation

*@description Calculates the mean absolute deviation of list of numbers

* @param {Integer} data

* @returns meanAbsoluteDeviation([2,34,5,0,-2]) = 10.480

* @url https://en.wikipedia.org/wiki/Average_absolute_deviation

*/

function meanAbsoluteDeviation(data) {

if (!Array.isArray(data)) {

throw new TypeError('Invalid Input')

}

let absoluteSum = 0

const meanValue = mean(data)

for (const dataPoint of data) {

absoluteSum += Math.abs(dataPoint - meanValue)

}

return absoluteSum / data.length

}

export { meanAbsoluteDeviation }