simplex.MakeSimplex3: simplex.MakeSimplex3

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

simplex.MakeSimplex3

Description

simplex.MakeSimplex3 iterates on the initially estimated values for non-fixed parameters, refining them to give the simplex an improved starting position. It is used within the FindWithinParams function, such that a matrix of optimised non-fixed parameters can be generated for each beat in an inputted batch.

Usage

simplex.MakeSimplex3(ppg, param,f,inScale, directions=NULL, inTol=-1, optional=NULL, debug=FALSE, beat_vector = beat_vector, renal_param, dias_param = dias_param, sys_time, w)

Arguments

ppg	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)
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

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

Note

simplex.MakeSimplex3 is for non-fixed (within 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.MakeSimplex2 function).

Examples

 within_params <- FindWithinParams(beats_in, ppg, beat = new_beat, gs = model2.GetSegment,
                                                fp = model2.FixParams3, ms = simplex.MakeSimplex3,
                                                m2 = model2.ChiSq3, beat_vector = beat_vector,
                                                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.