TreeRingIndex: Calculate tree ring index from chronosequence data...

In TreeRingShape: Recording Tree-Ring Shapes of Tree Disks with Manual Digitizing and Interpolating Model

Calculate tree ring index from chronosequence data (year,growth)

Description

Calculate tree ring index from chronosequence data (year,growth)

Usage

TreeRingIndex(ya, spar = 0.8)

Arguments

ya	data frame of chronosequence data (year,growth)
spar	smoothing parameter of spline curve

Value

list spline ; fitting parameter of Spline curve , idx ; data.frame(year,TreeRingIndex)

References

Cook, E., & Peters, K. (1981). The smoothing spline, a new approach to standardising forest interior tree-ring.Trre-ring Bulletin, 41, 45–53.

See Also

TreeRingsInterpolation

TreeRingShape documentation built on April 4, 2025, 5:10 a.m.