Subroutine FluorSail_dladgen (Version 2.3)

leafangles computes the leaf inclination distribution function (LIDF) frequencies for the 13 standard leaf angle classes, from the two Verhoef ellipsoidal LIDF shape parameters, by numerically inverting the cumulative distribution via dcum.

Usage

leafangles(a, b)

Arguments

a

numeric. LIDFa parameter, controls the average leaf slope (bimodality parameter of the ellipsoidal distribution).

b

numeric. LIDFb parameter, controls the distribution's bimodality/spread.

Value

A list with: lidf (numeric vector of length 13, the fraction of leaf area in each leaf angle class) and litab (numeric vector of length 13, the leaf angle class centers, degrees: 5,15,...,89).

References

For more information look to page 128 of "theory of radiative transfer models applied in optical remote sensing of vegetation canopies"

Author

Joris Timmermans, Christiaan van der Tol  (Original version in Matlab)

Carlos Camino (Ported version into R)

Examples

if (FALSE) { # \dontrun{
LeafDistribution <- leafangles(a = -0.35, b = -0.15)
} # }