distogram: Draw a color-coded triangular distance matrix

In aroneklund/squash: Color-Based Plots for Multivariate Visualization

Draw a color-coded triangular distance matrix

Description

This function draws a color-coded, rotated triangular matrix indicating the "distance" between every pair of items.

Usage

distogram(x, map, 
  n = 10, base = NA, colFn = heat, 
  key = TRUE,  title = NA, ...)

Arguments

x	A dist object, or a square numeric matrix.
map	A color map, as generated by makecmap (optional).
n, base, colFn	Arguments passed to makecmap, if map is omitted.
key	Add a color key?
title	Title for the color key.
...	Further arguments passed to trianglegram, (e.g. labels).

Details

If the input x is a matrix, the lower triangle is extracted by default (but see the arguments for trianglegram).

Value

The color map, invisibly.

See Also

corrogram

Examples

 
  ## Distances between European cities
  distogram(eurodist, title = "Distance (km)")  

  ## Some variations
  map <- distogram(eurodist, key = FALSE, colFn = jet, right = TRUE)  
  vkey(map, title = "Distance (km)", x = -8)

aroneklund/squash documentation built on June 3, 2023, 11:55 a.m.