ContinuousDistances: Distances for Continuous Data

In MultBiplotR: Multivariate Analysis Using Biplots in R

Distances for Continuous Data

Description

Calculates distances among rows of a continuous data matrix or among the rows of two continuous matrices.

Usage

  ContinuousDistances(x, y = NULL, coef = "Pythagorean", r = 1)

Arguments

x	Main data matrix. Distances among rows are calculated if y=NULL.
y	Supplementary data matrix. If not NULL the distances among the rows of x and y are calculated
coef	Distance coefficient. Use the name or the number(see details)
r	Exponent for the Minkowsky

Details

The following coefficients are calculated

1.- Pythagorean = sqrt(sum((y[i, ] - x[j, ])^2)/p)

2.- Taxonomic = sqrt(sum(((y[i,]-x[j,])^2)/r^2)/p)

3.- City = sum(abs(y[i,]-x[j,])/r)/p

4.- Minkowski = (sum((abs(y[i,]-x[j,])/r)^t)/p)^(1/t)

5.- Divergence = sqrt(sum((y[i,]-x[j,])^2/(y[i,]+x[j,])^2)/p)

6.- dif_sum = sum(abs(y[i,]-x[j,])/abs(y[i,]+x[j,]))/p

7.- Camberra = sum(abs(y[i,]-x[j,])/(abs(y[i,])+abs(x[j,])))

8.- Bray_Curtis = sum(abs(y[i,]-x[j,]))/sum(y[i,]+x[j,])

9.- Soergel = sum(abs(y[i,]-x[j,]))/sum(apply(rbind(y[i,],x[j,]),2,max))

10.- Ware_hedges = sum(abs(y[i,]-x[j,]))/sum(apply(rbind(y[i,],x[j,]),2,max))

Value

A list with:

Data	A matrix with the initial data (x matrix).
SupData	A matrix with the supplementary data (y matrix).
D	The matrix of distances
Coefficient	The coefficient used.

Author(s)

Jose Luis Vicente-Villardon

References

Gower, J. C. (2006) Similarity dissimilarity and Distance, measures of. Encyclopedia of Statistical Sciences. 2nd. ed. Volume 12. Wiley

See Also

PrincipalCoordinates

Examples

data(wine)
dis=ContinuousDistances(wine[,4:21])

MultBiplotR documentation built on Nov. 21, 2023, 5:08 p.m.