pcds (version 0.1.6)

IndNCSend.int: The indicator for the presence of an arc from a point to another for Central Similarity Proximity Catch Digraphs (CS-PCDs) - end interval case

Description

Returns \(I(p_2\) in \(N_{CS}(p_1,t))\) for points \(p_1\) and \(p_2\), that is, returns 1 if \(p_2\) is in \(N_{CS}(p_1,t)\), returns 0 otherwise, where \(N_{CS}(x,t)\) is the CS proximity region for point \(x\) with expansion parameter \(t>0\) for the region outside the interval \((a,b)\).

rv is the index of the end vertex region \(p_1\) resides, with default=NULL, and rv=1 for left end interval and rv=2 for the right end interval. If \(p_1\) and \(p_2\) are distinct and either of them are inside interval int, it returns 0, but if they are identical, then it returns 1 regardless of their locations (i.e., it allows loops).

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

Usage

IndNCSend.int(p1, p2, int, t, rv = NULL)

Value

\(I(p_2\) in \(N_{CS}(p_1,t))\) for points \(p_1\) and \(p_2\), that is, returns 1 if \(p_2\) is in \(N_{CS}(p_1,t)\)

(i.e., if there is an arc from \(p_1\) to \(p_2\)), returns 0 otherwise

Arguments

p1

A 1D point for which the CS proximity region is constructed.

p2

A 1D point to check whether it is inside the proximity region or not.

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.

rv

Index of the end interval containing the point, either 1,2 or NULL (default=NULL).

Author

Elvan Ceyhan

References

See Also

IndNCSmid.int, IndNPEmid.int, and IndNPEend.int

Examples

a<-0; b<-10; int<-c(a,b)
t<-2

IndNCSend.int(15,17,int,t)
IndNCSend.int(1.5,17,int,t)