uniquemap.default: Map Duplicate Entries to Unique Entries

In spatstat.univar: One-Dimensional Probability Distribution Support for the 'spatstat' Family

Map Duplicate Entries to Unique Entries

Description

Determine whether entries in a vector (or rows in a matrix or data frame) are duplicated, choose a unique representative for each set of duplicates, and map the duplicates to the unique representative.

Usage

uniquemap(x)

## Default S3 method:
uniquemap(x)

## S3 method for class 'data.frame'
uniquemap(x)

## S3 method for class 'matrix'
uniquemap(x)

Arguments

x	A vector, data frame or matrix, or another type of data.

Details

The function uniquemap is generic, with methods for point patterns, data frames, and a default method.

The default method expects a vector. It determines whether any entries of the vector x are duplicated, and constructs a mapping of the indices of x so that all duplicates are mapped to a unique representative index.

The result is an integer vector u such that u[j] = i if the entries x[i] and x[j] are identical and point i has been chosen as the unique representative. The entry u[i] = i means either that point i is unique, or that it has been chosen as the unique representative of its equivalence class.

The method for data.frame determines whether any rows of the data frame x are duplicated, and constructs a mapping of the row indices so that all duplicate rows are mapped to a unique representative row.

Value

An integer vector.

Author(s)

\spatstatAuthors

.

See Also

duplicated.

uniquemap.ppp in spatstat.geom

Examples

  x <- c(3, 5, 2, 4, 2, 3)
  uniquemap(x)

  df <- data.frame(A=x, B=42)
  uniquemap(df)

  z <- cbind(x, 10-x)
  uniquemap(z)

spatstat.univar documentation built on June 8, 2025, 12:52 p.m.