Initial commit

Sources/ECGSynKit/ECGSynKit.swift

@@ -0,0 +1,48 @@
+import Algorithms
+import ComplexModule
+import RealModule
+import Foundation
+import PFFFT
+
+public struct TimeParameters {
+    /// The number of beats to simulate.
+    let numBeats: Int = 12
+
+    /// The internal sampling frequency in Hz.
+    let srInternal: Int = 512
+
+    /// Output decimation factor
+    let decimateFactor: Int = 2
+
+    /// The mean heart rate in beats per minute.
+    let hrMean: Double = 60.0
+
+    /// The standard deviation of the heart rate.
+    let hrStd: Double = 1.0
+
+    /// RNG seed value.
+    let seed: UInt64 = 8
+}
+
+public struct RRParameters {
+    /// Mayer wave frequency in Hz.
+    let flo = 0.1
+
+    /// flo standard deviation.
+    let flostd = 0.01
+
+    /// Respiratory rate frequency in Hz.
+    let fhi = 0.25
+
+    /// fhi standard deviation.
+    let fhistd = 0.01
+
+    /// The ratio of power between low and high frequencies.
+    let lfhfRatio: Double = 0.5
+}
+
+func stdev(_ data: [Double]) -> Double {
+    let n = Double(data.count)
+    let mean = data.reduce(0.0, +) / n
+    return sqrt(data.lazy.map { ($0 - mean) * ($0 - mean) }.reduce(0.0, +) / (n - 1))
+}