simplex.MakeSimplex2: simplex.MakeSimplex2

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

simplex.MakeSimplex2

Description

simplex.MakeSimplex2 iterates on the initially estimated values for fixed parameters, refining them to give the simplex an improved starting position.

Usage

simplex.MakeSimplex2(data,param,f,inScale,directions=NULL,inTol=-1, optional=NULL,debug=FALSE, beat_vector = beat_vector, beat = beat, renal_param = renal_param, dias_param = dias_param, sys_time = sys_time, w)

Arguments

data	ppg time series segment
param	model parameter inputs
f	model2.ChiSq3 function
inScale	the starting value by which to iterate on parameter values (0.1 recommended)
directions	the initial direction in which to iterate parameter values (default null)
inTol	the minimum value a parameter can change if it cannot be iterated upon to improve goodness of fit
optional	for direct input into model2.ChiSq3 function, default NULL
debug	logical, if true iteration and refinement statuses will be printed to console
beat_vector	an index of beats to be modeled and their x-coordinates to extract from the PPG time series (for direct input to f)
beat	matrix of intial parameter estimates
renal_param	the starting parameter for 1st reflectance peak timing (inputted to prevent drastic deviations from this value)
dias_param	the starting parameter for 2nd reflectance peak timing (inputted to prevent drastic deviations from this value)
sys_time	the starting parameter for systolic peak timing (inputted to prevent drastic deviations from this value)
w	the timing of the 1st derivative peaks on the ppg time series

Value

result

Da matrix of parameter sets, including the initially inputted parameters (row 1) and a parameter set for each refined parameter

Note

simplex.MakeSimplex2 is for fixed (across beat) parameters only. Thus the outputted matrix will include absent (NA) rows where non-fixed parameters are represented (these are refined separately in the simplex.MakeSimplex3 function).

Examples

across_params <- simplex.MakeSimplex2(data=ppg, param = par, f = model2.ChiSq3,
                                                    inScale = 0.1, beat_vector = beat_vector,
                                                    beat = new_beat, renal_param = renal_param,
                                                    dias_param = dias_param, sys_time = sys_time, w = w)

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