44 lines
1008 B
TypeScript
44 lines
1008 B
TypeScript
export function average(values: number[]) {
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let total = 0;
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for (let i = 0; i < values.length; i += 1) {
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total += values[i];
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}
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return total / values.length;
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}
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export function median(values: number[]) {
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const half = Math.floor(values.length / 2);
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values.sort((a, b) => a - b);
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if (values.length % 2) return values[half];
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return (values[half - 1] + values[half]) / 2;
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}
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export function quartile(values: number[], percentile: number) {
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values.sort((a, b) => a - b);
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const pos = (values.length - 1) * percentile;
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const base = Math.floor(pos);
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const rest = pos - base;
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if (values[base + 1] !== undefined) {
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return values[base] + rest * (values[base + 1] - values[base]);
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}
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return values[base];
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}
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export function jitter(values: number[]) {
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// Average distance between consecutive latency measurements...
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let jitters = [];
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for (let i = 0; i < values.length - 1; i += 1) {
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jitters.push(Math.abs(values[i] - values[i + 1]));
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}
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return average(jitters);
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}
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