rename

Sources/ECGSynKit/RRSeries.swift

@@ -0,0 +1,44 @@
+import Foundation
+import RealModule
+
+public struct RRSeries<T: BinaryFloatingPoint> {
+    public let timeParameters: TimeParameters
+    public let rrParamaters: RRParameters
+    let rng: RandomNumberGenerator
+
+    struct Segment {
+        let end: T
+        let value: T
+    }
+    let segments: [Segment]
+    let count: Int
+
+    public init(timeParameters: TimeParameters, rrParamaters: RRParameters, rng: RandomNumberGenerator, signal: [T]) {
+        self.timeParameters = timeParameters
+        self.rrParamaters = rrParamaters
+        self.rng = rng
+
+        let sr = T(timeParameters.srInternal)
+
+        var rrn = [Segment]()
+        // generate piecewise RR time series
+        do {
+            var tecg = T.zero
+            var i = 0
+            while i < signal.count {
+                tecg += signal[i]
+                rrn.append(Segment(end: tecg, value: signal[i]))
+                i = Int((tecg * sr).rounded(.toNearestOrEven)) + 1
+            }
+        }
+
+        segments = rrn
+        count = signal.count
+    }
+
+    public func valueAt(_ t: T) -> T {
+        let index = min(segments.partitioningIndex { t < $0.end }, segments.endIndex - 1)
+        return segments[index].value
+    }
+
+}