soundgen (version 2.7.2)

getIntegerRandomWalk: Discrete random walk

Description

Takes a continuous random walk and converts it to continuous epochs of repeated values 0/1/2, each at least minLength points long. 0/1/2 correspond to different noise regimes: 0 = no noise, 1 = subharmonics, 2 = subharmonics and jitter/shimmer.

Usage

getIntegerRandomWalk(
  rw,
  nonlinBalance = 50,
  minLength = 50,
  q1 = NULL,
  q2 = NULL,
  plot = FALSE
)

Value

Returns a vector of integers (0/1/2) of the same length as rw.

Arguments

rw

a random walk generated by getRandomWalk (expected range 0 to 100)

nonlinBalance

a number between 0 to 100: 0 = returns all zeros; 100 = returns all twos

minLength

the mimimum length of each epoch

q1, q2

cutoff points for transitioning from regime 0 to 1 (q1) or from regime 1 to 2 (q2). See noiseThresholdsDict for defaults

plot

if TRUE, plots the random walk underlying nonlinear regimes

Examples

rw = getRandomWalk(len = 100, rw_range = 100, rw_smoothing = .2)
r = getIntegerRandomWalk(rw, nonlinBalance = 75,
                         minLength = 10, plot = TRUE)
r = getIntegerRandomWalk(rw, nonlinBalance = 15,
                         q1 = 30, q2 = 70,
                         minLength = 10, plot = TRUE)