energy {SBCK}

Energy distance

Description

Compute Energy distance between two dataset or SparseHist X and Y

Usage

energy(X, Y, p = 2, metric = "euclidean")

Arguments

X

[matrix or SparseHist] If matrix, dim = ( nrow = n_samples, ncol = n_features)

Y

[matrix or SparseHist] If matrix, dim = ( nrow = n_samples, ncol = n_features)

p

[float] power of energy distance, default is 2.

metric

[str or function] metric for pairwise distance, default is "euclidean", see SBCK::pairwise_distances

Value

[float] value of distance

Examples

X = base::cbind( stats::rnorm(2000) , stats::rnorm(2000)  )
Y = base::cbind( stats::rnorm(2000,mean=10)  , stats::rnorm(2000) )
bw = base::c(0.1,0.1)
muX = SBCK::SparseHist( X , bw )
muY = SBCK::SparseHist( Y , bw )

## The four are equals
w2 = SBCK::energy(X,Y)
w2 = SBCK::energy(muX,Y)
w2 = SBCK::energy(X,muY)
w2 = SBCK::energy(muX,muY)