matrix_to_long {segregation}

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")