49 lines
1.1 KiB
Swift
49 lines
1.1 KiB
Swift
import Algorithms
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import ComplexModule
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import RealModule
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import Foundation
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import PFFFT
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public struct TimeParameters {
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/// The number of beats to simulate.
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let numBeats: Int = 12
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/// The ECG sampling frequency in Hz.
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let srEcg: Int = 256
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/// The internal sampling frequency in Hz.
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let srInternal: Int = 512
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/// The mean heart rate in beats per minute.
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let hrMean: Double = 70.0
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/// The standard deviation of the heart rate.
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let hrStd: Double = 1.0
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/// RNG seed value.
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let seed: UInt64 = 8
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}
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public struct RRParameters {
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/// Mayer wave frequency in Hz.
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let flo = 0.1
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/// flo standard deviation.
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let flostd = 0.01
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/// Respiratory rate frequency in Hz.
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let fhi = 0.25
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/// fhi standard deviation.
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let fhistd = 0.01
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/// The ratio of power between low and high frequencies.
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let lfhfRatio: Double = 0.5
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}
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func stdev(_ data: [Double]) -> Double {
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let n = Double(data.count)
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let mean = data.reduce(0.0, +) / n
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return sqrt(data.lazy.map { ($0 - mean) * ($0 - mean) }.reduce(0.0, +) / (n - 1))
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}
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