pcds (version 0.1.8)

inci.matCSint: Incidence matrix for Central Similarity Proximity Catch Digraphs (CS-PCDs) for 1D data - one interval case

Description

Returns the incidence matrix for the CS-PCD for a given 1D numerical data set, Xp, as the vertices of the digraph and int determines the end points of the interval (in the one interval case). Loops are allowed, so the diagonal entries are all equal to 1.

CS proximity region is constructed with an expansion parameter \(t > 0\) and a centrality parameter \(c \in (0,1)\).

See also (ceyhan:revstat-2016;textualpcds).

Usage

inci.matCSint(Xp, int, t, c = 0.5)

Value

Incidence matrix for the CS-PCD with vertices being 1D data set, Xp, and int determines the end points of the intervals (in the one interval case)

Arguments

Xp

a set of 1D points which constitutes the vertices of the digraph.

int

A vector of two real numbers representing an interval.

t

A positive real number which serves as the expansion parameter in CS proximity region.

c

A positive real number in \((0,1)\) parameterizing the center inside middle intervals with the default c=.5. For the interval, int\(=(a,b)\), the parameterized center is \(M_c=a+c(b-a)\).

Author

Elvan Ceyhan

References

See Also

inci.matCS1D, inci.matPE1D, inci.matPEtri, and inci.matPE

Examples

# \donttest{
c<-.4
t<-1
a<-0; b<-10; int<-c(a,b)

xf<-(int[2]-int[1])*.1

set.seed(123)

n<-10
Xp<-runif(n,a-xf,b+xf)

IM<-inci.matCSint(Xp,int,t,c)
IM

dom.num.greedy(IM)
Idom.num.up.bnd(IM,3)
dom.num.exact(IM)

inci.matCSint(Xp,int+10,t,c)
# }