R/calculation.R
rdst_MerginePlus.Rd
Return relative distance between two representative tree rings
rdst_MerginePlus(L, P, yr)
is a list of tree rings(x,y coordinates).
data.frame (x,y,id,yr,r,deg) of radial tree ring points (TR@P)
integer of year
a data frame with relative distance and center angle(degree) with mergine (-90 - 0 - 360 - 90)