dist_match {DMTL}

Distribution Matching for Source and Reference Datasets

Description

This function matches a source distribution to a given reference distribution such that the data in the source space can effectively be transferred to the reference space i.e. domain transfer via distribution matching.

Usage

dist_match(
  src,
  ref,
  src_cdf,
  ref_cdf,
  lims,
  density = FALSE,
  samples = 1e+06,
  seed = NULL
)

Arguments

src

Vector containing the source data to be matched.

ref

Vector containing the reference data to estimate the reference distribution for matching.

src_cdf

Vector containing source distribution values. If missing, these values are estimated from the source data using estimate_cdf().

ref_cdf

Vector containing reference distribution values. If missing, these values are estimated from the reference data using estimate_cdf().

lims

Vector providing the range of the knot values for mapping. If missing, these values are estimated from the reference data.

density

Flag for using kernel density estimates for matching instead of histogram counts. Defaults to False.

samples

Sample size for estimating distributions if src_cdf and/or ref_cdf are missing. Defaults to 1e6.

seed

Seed for random number generator (for reproducible outcomes). Defaults to NULL.

Value

A vector containing the matched values corresponding to src.

Examples

set.seed(7531)
x1 <- rnorm(100, 0.2, 0.6)
x2 <- runif(200)
matched <- dist_match(src = x1, ref = x2, lims = c(0, 1))

## Plot histograms...
opar <- par(mfrow = c(1, 3))
hist(x1);    hist(x2);    hist(matched)
par(opar)              # Reset par