matrix_to_long: Turns a contingency table into long format

In segregation: Entropy-Based Segregation Indices

Turns a contingency table into long format

Description

Returns a data.table in long form, such that it is suitable for use in mutual_total, etc. Colnames and rownames of the matrix will be respected.

Usage

matrix_to_long(
  matrix,
  group = "group",
  unit = "unit",
  weight = "n",
  drop_zero = TRUE
)

Arguments

matrix	A matrix, where the rows represent the units, and the column represent the groups.
group	Variable name for group. (Default group)
unit	Variable name for unit. (Default unit)
weight	Variable name for frequency weight. (Default weight)
drop_zero	Drop unit-group combinations with zero weight. (Default TRUE)

Value

A data.table.

Examples

m <- matrix(c(10, 20, 30, 30, 20, 10), nrow = 3)
colnames(m) <- c("Black", "White")
long <- matrix_to_long(m, group = "race", unit = "school")
mutual_total(long, "race", "school", weight = "n")

segregation documentation built on May 29, 2024, 9:15 a.m.