checking.gram.similarityMatrix: Gram similarity matrix checker

In sClust: R Toolbox for Unsupervised Spectral Clustering

Description

Function to check if a similarity matrix is Gram or not

Usage

checking.gram.similarityMatrix(W, flagDiagZero = FALSE, verbose = FALSE)

Arguments

W	Gram Similarity Matrix or not.
flagDiagZero	if True, Put zero on the similarity matrix W.
verbose	To output the verbose in the terminal.

Value

a Gram similarity matrix

Author(s)

Emilie Poisson Caillault and Erwan Vincent

Examples

### Example 1: 2 disks of the same size
n<-100 ; r1<-1
x<-(runif(n)-0.5)*2;
y<-(runif(n)-0.5)*2
keep1<-which((x*2+y*2)<(r1*2))
disk1<-data.frame(x+3*r1,y)[keep1,]
disk2 <-data.frame(x-3*r1,y)[keep1,]
sameTwoDisks <- rbind(disk1,disk2)
W <- compute.similarity.ZP(scale(sameTwoDisks))
W <- checking.gram.similarityMatrix(W)

### Example 2: Speed and Stopping Distances of Cars
W <- compute.similarity.ZP(scale(cars))
W <- checking.gram.similarityMatrix(W)

sClust documentation built on Aug. 24, 2021, 1:06 a.m.