plotPEarcs1D: The plot of the arcs of Proportional Edge Proximity Catch Digraphs (PE-PCDs) for 1D data (vertices jittered along $y$ -coordinate) - multiple interval case

Description

Plots the arcs of PE-PCD whose vertices are the 1D points, Xp. PE proximity regions are constructed with expansion parameter $r \geq 1$ and centrality parameter $c \in (0, 1)$ and the intervals are based on Yp points (i.e. the intervalization is based on Yp points). That is, data set Xp constitutes the vertices of the digraph and Yp determines the end points of the intervals. If there are duplicates of Yp or Xp points, only one point is retained for each duplicate value, and a warning message is printed.

For better visualization, a uniform jitter from $U (- J i t, J i t)$ (default for $J i t = .1$ ) is added to the $y$ -direction where Jit equals to the range of Xp and Yp multiplied by Jit with default for $J i t = .1$ ). centers is a logical argument, if TRUE, plot includes the centers of the intervals as vertical lines in the plot, else centers of the intervals are not plotted.

See also (ceyhan:metrika-2012;textualpcds).

Usage

plotPEarcs1D(
  Xp,
  Yp,
  r,
  c = 0.5,
  Jit = 0.1,
  main = NULL,
  xlab = NULL,
  ylab = NULL,
  xlim = NULL,
  ylim = NULL,
  centers = FALSE,
  ...
)

Value

A plot of the arcs of PE-PCD whose vertices are the 1D data set Xp in which vertices are jittered along $y$ -axis for better visualization.

Arguments

Xp: A vector of 1D points constituting the vertices of the PE-PCD.
Yp: A vector of 1D points constituting the end points of the intervals.
r: A positive real number which serves as the expansion parameter in PE proximity region; must be $\geq 1$ .
c: A positive real number in $(0, 1)$ parameterizing the center inside middle intervals with the default c=.5. For the interval, $(a, b)$ , the parameterized center is $M_{c} = a + c (b - a)$ .
Jit: A positive real number that determines the amount of jitter along the $y$ -axis, default=0.1 and Xp points are jittered according to $U (- J i t, J i t)$ distribution along the $y$ -axis where Jit equals to the range of the union of Xp and Yp points multiplied by Jit).
main: An overall title for the plot (default=NULL).
xlab, ylab: Titles of the $x$ and $y$ axes in the plot (default=NULL for both).
xlim, ylim: Two numeric vectors of length 2, giving the $x$ - and $y$ -coordinate ranges (default=NULL for both).
centers: A logical argument, if TRUE, plot includes the centers of the intervals as vertical lines in the plot, else centers of the intervals are not plotted.
...: Additional plot parameters.

Author

Elvan Ceyhan

References

Examples

Run this code

# \donttest{
r<-2
c<-.4
a<-0; b<-10; int<-c(a,b)

#nx is number of X points (target) and ny is number of Y points (nontarget)
nx<-20; ny<-4;  #try also nx<-40; ny<-10 or nx<-1000; ny<-10;

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

Xp<-runif(nx,a-xf,b+xf)
Yp<-runif(ny,a,b)

Xlim=range(Xp,Yp)
Ylim=.1*c(-1,1)

jit<-.1

set.seed(1)
plotPEarcs1D(Xp,Yp,r=1.5,c=.3,jit,xlab="",ylab="",centers=TRUE)
set.seed(1)
plotPEarcs1D(Xp,Yp,r=2,c=.3,jit,xlab="",ylab="",centers=TRUE)
# }

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