find_u_v: find_u_v

In stw32/PulseWaveform: Extraction of Photoplethysmography Waveform Features and Decomposition Modeling of Pulse Waveforms

find_u_v

Description

find_u_v identifies the points on the systolic upstroke that correspond to the two half maximum values on the corresponding first derivative peak. The first, before w, is denoted U. The second, after w, is denoted V.

Usage

find_u_v(wx, wy, d1, d1p, spline, sr, plot)

Arguments

wx	A vector of x-coordinates corresponding to w points on the PPG time series
wy	A vector of y-coordinates corresponding to w points on the PPG time series
d1	The first derivative time series, discrete form
d1p	The first derivative time series, polynomial spline form
spline	The original PPG time series, polynomial spline form
sr	samplingRate
plot	Logical, will plot the first derivative time series with U and V values as points if set to true

Value

uX	A vector of x-xoordinates corresponding to U points on the PPG time series
uY	A vector of y-xoordinates corresponding to U points " "
vX	A vector of x-xoordinates corresponding to V points " "
vY	A vector of y-xoordinates corresponding to V points " "

Examples

find_u_v(wx = w$wX, wy = w$wY, d1 = deriv1, d1p = deriv1Poly,
     spline = splinePoly, sr = samplingRate, plot=F)

stw32/PulseWaveform documentation built on Dec. 6, 2022, 2:50 a.m.