Reference

All functions
DiskInfo()	Return information for tree disk analysed from TreeRingShape class
Ldeg360()	Return a vector of center angle 0 to 360(degree) for x y coordinate vector
Llist2dataframe()	Convert from a list of tree rings polygons (L) to data frame to a data frame with no.,year,x,y,r(radius),radian(center angle),degree. The data frame is sorted by degree(0 to 360).
Lmove()	Move the tree rings coordinates based on P00 (x,y movement coordinates).
Lplot()	Plot a graphics of tree rings
Lplot2()	Draw a graphics of tree rings by 1 ring (3*3 in a screen)
Lrad.plot()	Check center angle of points to input order
Lrn()	Return a ring number of tree ring polygons list (L) from year
Lsort()	Sort x,y coordinates of a tree ring line with center angle of each point
Lsort_all()	Sort x,y coordinates of tree ring lines with center angle of each point apply Lsort to list of tree ring lines
ReadShapefile_P00()	Return x,y coordinates of a tree ring center point (P00) from shape file of tree ring points
ReadShapefile_TreeRingPoints()	Read a shape file of Tree Ring Points ( P : radial input and correction points)
ReadShapefile_TreeRings()	Read Shapefile_TreeRings
TR	A sample object of class TreeRingShape
TR_	A sample object of class TreeRingShape, shapefile paths and column names only.
TreeRingIndex()	Calculate tree ring index from chronosequence data (year,growth)
TreeRingShape()	Construct a object (TR) of classTreeRingShape
TreeRingsInterpolation()	Interpolates tree ring between representative (manual input) tree rings with tree ring points
TreeRingsLines()	Read representative tree ring lines from shape files
TreeRingsPoints()	Read TreeRingsPoints shape file, check and save parameters
WriteShapefile_TreeRings()	Write a shapefile of interpolated tree rings
area()	Return a area from polygon xy coordinates
circumference()	Return circumference length of polygon line
classTreeRingShape-class	class of TreeRingShape
degree	Constant for conversion from degree to radian ####
dst()	Return a vector of distances from original a point (0,0) from a matrix or data frame of xy coordinates
dstpp()	Return vector for distance between adjacent two points
new_classTreeRingShape()	Initial setting of a new classTreeRingShape (TR)
nstP()	Return a vector of row numbers of points that have nearest center angle
plot_TreeRing()	Draw a plot of tree rings This function draws Tree rings of a disk from x, y list(x,y) with name of year.
plot_TreeRing_df()	plot_TreeRing_df Draw a Tree ring of a disk from data frame(x,y,year)
plot_TreeRings_df()	Plot tree rings from data fame This function draws Tree rings of a disk from data frame(x,y,year).
plot_year_RingArea()	Plot and return data frame of year_disk area and year_Tree ring area
rdst()	Return relative distance between two representative tree rings
rdst_MerginePlus()	Return relative distance between two representative tree rings
seq_deg()	Return a vector of sequence of angles between start and end angle 0 to pi -pi to 0