leafsfirst {denpro}R Documentation

Calculates a level set tree, shape tree, or tail tree

Description

Calculates a level set tree or shape tree from a piecewise constant function, or calculates a tail tree from a data set.

Usage

leafsfirst(pcf = NULL, lev = NULL, refe = NULL, type = "lst", 
levmet = "radius", ordmet = "etaisrec", ngrid = NULL, dendat = NULL, rho = 0,
propor= NULL, lowest = "dens")

Arguments

pcf piecewise constant function; output of for example "pcf.kern", or "pcf.func"
lev positive real number; a level of the level set whose shape tree will be calculated
refe vector of d real numbers; the reference point of the shape tree
type "lst" or "shape"; not needed
levmet "radius" or "proba"; radius plot or probability content plot
ordmet "etaisrec" or "baryrec"; a distance to a rectangle is defined to be the distance to the boundary or the distance to the barycenter; concerns shape trees
ngrid a positive integer; the tree will be pruned to contain "ngrid" levels
dendat n*d data matrix; gives the data set when a tail tree will be calculated
rho positive real number; the resolution threshold for the tail tree
propor 0<propor<1; a shape tree of the level set whose level is "propor" times the maximum value of the function will be calculated
lowest a character; if lowest="dens", then it is assumed that the function whose level set tree we calculate is nonnegative

Value

a level set tree, shape tree, or tail tree

Author(s)

Jussi Klemela

See Also

pcf.kern, treedisc, plotvolu, plotbary,

Examples

dendat<-sim.data(n=100,type="mulmod")
pcf<-pcf.kern(dendat,h=1,N=c(32,32))

# level set tree

lst<-leafsfirst(pcf)          

td<-treedisc(lst,pcf,ngrid=30)
plotvolu(td)

# shape tree

st<-leafsfirst(pcf,propo=0.1)   # 10% level set  

tdst<-treedisc(st,pcf,ngrid=30)
plotvolu(tdst)

# tail tree

rho<-0.65
tt<-leafsfirst(dendat=dendat,rho=rho)

plotbary(tt)


[Package denpro version 0.9.0 Index]