react-sparklines-ts/dist/dataProcessing/stdev.js

Beautiful and expressive Sparklines component for React (continued)

import { mean } from "./mean";
export const stdev = (data) => {
    const dataMean = mean(data);
    const sqDiff = data.map((n) => (n - dataMean) ** 2);
    const avgSqDiff = mean(sqDiff);
    return Math.sqrt(avgSqDiff);
};