dmix: dmix

In mskilab/skitools: Various mskilab R utilties

dmix

Description

generates data frame of density points in a provided range for a provided mix of k densities of a singlen family useful for plugging into downstream plotting (eg ggplot 2)

"..." variables depend on density function, arguments should be provided as they would to the corresponding R function (ie with respect to vectorization)

if collapse = TRUE then the density will be summed according to the mixing parameter yielding a single density (ie a fuzzy histogram) summarizing the mixing distribution

Usage

dmix(
  dens = "dnorm",
  xlim = NULL,
  n = 500,
  alpha = NULL,
  plot = F,
  fill = T,
  collapse = F,
  ...
)

Arguments

dens	character specifying R density function, the possibilities include (with ... arguments shown alongside the density names) dnorm: mean, sd dbinom: size, prob dmultinom: size, prob dgamma: shape, rate dbeta: shape1, shape2
xlim	length 2 vector specifying plot bounds (=NULL)
n	integer number of points to draw distribution over (=500)
alpha	length(k) numeric vector specifying mixing probability
plot	logical flag specifying whether to draw the plot (=FALSE)
fill	logical flag specifying whether to fill the colored plots (=TRUE)
collapse	collapse logical flag whether to collapse the mixture components into a single mixture)
...	additional density specific arguments each with vectorized values of length k, where k is the number of desired mixture componetns, see dens arugment)

Value

if plot == TRUE then ggplot2 object of plot, otherwise data.frame of data points with fields $id specifying thee mixture id, $x = data value,

Author(s)

Marcin Imielinski

mskilab/skitools documentation built on June 15, 2025, 2:54 p.m.