Tidy a(n) Mclust object

Tidy summarizes information about the components of a model. A model component might be a single term in a regression, a single hypothesis, a cluster, or a class. Exactly what tidy considers to be a model component varies across models but is usually self-evident. If a model has several distinct types of components, you will need to specify which components to return.

# S3 method for Mclust
tidy(x, ...)

Arguments

x

An Mclust object return from mclust::Mclust().

...

Additional arguments. Not used. Needed to match generic signature only. Cautionary note: Misspelled arguments will be absorbed in ..., where they will be ignored. If the misspelled argument has a default value, the default value will be used. For example, if you pass conf.lvel = 0.9, all computation will proceed using conf.level = 0.95. Additionally, if you pass newdata = my_tibble to an augment() method that does not accept a newdata argument, it will use the default value for the data argument.

See also

tidy(), mclust::Mclust()

Other mclust tidiers: augment.Mclust()

Value

A tibble::tibble() with columns:

proportion

The mixing proportion of each component

size

Number of points assigned to cluster.

mean

The mean for each component. In case of 2+ dimensional models, a column with the mean is added for each dimension. NA for noise component

variance

In case of one-dimensional and spherical models, the variance for each component, omitted otherwise. NA for noise component

component

Cluster id as a factor.

Examples

if (requireNamespace("mclust", quietly = TRUE)) {

library(dplyr)
library(mclust)
set.seed(27)

centers <- tibble::tibble(
  cluster = factor(1:3),
  num_points = c(100, 150, 50), # number points in each cluster
  x1 = c(5, 0, -3), # x1 coordinate of cluster center
  x2 = c(-1, 1, -2) # x2 coordinate of cluster center
)

points <- centers %>%
  mutate(
    x1 = purrr::map2(num_points, x1, rnorm),
    x2 = purrr::map2(num_points, x2, rnorm)
  ) %>%
  dplyr::select(-num_points, -cluster) %>%
  tidyr::unnest(c(x1, x2))

m <- mclust::Mclust(points)

tidy(m)
augment(m, points)
glance(m)

}
#> # A tibble: 1 × 7
#>   model     G    BIC logLik    df hypvol  nobs
#>   <chr> <int>  <dbl>  <dbl> <dbl>  <dbl> <int>
#> 1 EII       3 -2402. -1175.     9     NA   300