Add maximumIntensity helper

src/index.ts

@@ -11,3 +11,4 @@ export { Intensity, ConstantIntensity, RangeIntensity, FreeIntensity } from "./I
 // stats utils
 export { totalDuration } from "./stats/totalDuration";
 export { intensityToZoneIndex, ZoneIndex } from "./stats/zoneDistribution";
+export { maximumIntensity } from "./stats/maximumIntensity";

src/stats/maximumIntensity.ts

@@ -0,0 +1,7 @@
+import { Interval } from "../ast";
+import { ConstantIntensity } from "../Intensity";
+
+export const maximumIntensity = (intervals: Interval[]): ConstantIntensity =>
+  new ConstantIntensity(
+    Math.max(...intervals.map((interval) => Math.max(interval.intensity.start, interval.intensity.end))),
+  );