cmanhattan: Calculate the Manhattan distances for each pair of factors or...

In cmahalanobis: Calculate Distance Measures for DataFrames

Calculate the Manhattan distances for each pair of factors or for the index.

Description

This function takes a dataframe and a variable or variables (two or more) in input, and returns a matrix or matrices (two or more) with the Manhattan distances about the factors inside them. You can also select "index" to calculate the Manhattan distances between each row.

Usage

cmanhattan(
  dataset,
  formula,
  plot = TRUE,
  plot_title = "Manhattan Distance Between Groups",
  min_group_size = 3
)

Arguments

dataset	A dataframe.
formula	The index of the dataframe, otherwise a variable or variables (two or more) with factors which you want to calculate the Manhattan distances matrix or matrices (two or more).
plot	Logical, if TRUE, a plot or plots (two or more) of the Manhattan distances matrix or matrices about factors (two or more) are displayed.
plot_title	If plot is TRUE, the title to be used for plot or plots about factors. The default value is TRUE.
min_group_size	Minimum group size to maintain. The default value is 3, therefore groups, inside variables, with less than 3 observations will be discarded. For "index", this value is always 1.

Value

According to the option chosen in formula, with "index" the Manhattan distances matrix will be printed; instead, by specifying variables, the Manhattan distances matrix or matrices (two or more) between each pair of groups and, optionally, the plot or plots (two or more) will be printed.

Note

If "index" is selected with variables, only distances between rows are calculated. Therefore, this snippet: "cmanhattan(mtcars, ~am + carb + index)" will print the distances only considering "index". Rows with NA values are omitted.

Examples

# Example with iris dataset

data(iris)

cmanhattan(iris, ~Species, plot = TRUE, 
plot_title = "Manhattan Distance Between Groups", min_group_size = 3)

# Example with mtcars dataset

data(mtcars)

cmanhattan(mtcars, ~am + vs, plot = TRUE, 
plot_title = "Manhattan Distance Between Groups", min_group_size = 3)

# Calculate the Manhattan distance for 32 car models in "mtcars" dataset
res <- cmanhattan(mtcars, ~index, min_group_size = 3)

cmahalanobis documentation built on Sept. 14, 2025, 5:09 p.m.