Learn R Programming

RLeafAngle (version 1.0)

Estimates, Plots and Evaluates Leaf Angle Distribution Functions, Calculates Extinction Coefficients

Description

Leaf angle distribution is described by a number of functions (e.g. ellipsoidal, Beta and rotated ellipsoidal). The parameters of leaf angle distributions functions are estimated through different empirical relationship. This package includes estimations of parameters of different leaf angle distribution function, plots and evaluates leaf angle distribution functions, calculates extinction coefficients given leaf angle distribution. Reference: Wang(2007).

Copy Link

Version

Install

install.packages('RLeafAngle')

Monthly Downloads

134

Version

1.0

License

GPL

Maintainer

Wei-Min Wang

Last Published

June 20th, 2017

Functions in RLeafAngle (1.0)

computeBeta

Compute the parameter of Beta function given leaf angle distribution mearuements.
computeG

Compute the mean projection of unit leaf area on the plane perpendicular to beam direction, namely, G parameter.
LADdensity

Retrieve the density of leaf area given leaf angle measurements.
Pisek

Leaf angle distribution measurements provided by Jan Pisek
computeLambdaR

Compute the parameter of rotated-ellipsoidal function given leaf angle distribution mearuements.
computeSunlit

Compute the fraction of sunlit folige given solar position, LAI and G value with the assumption of the symmetric distribution of leaf azimuth angle.
BetaDis

Compute the Beta distribution of leaf zenith angle.
Falster

Leaf angle distribution measurements provided by D.S. Falster
interErectophile

Compute the fraction leaf area of Erectophile distribution given leaf angle intervals (in degree).
interExtremophile

Compute the fraction leaf area of Extremophile distribution given leaf angle intervals (in degree).
selectClassic

Retrieve the density of leaf area given leaf angle measurements.
sphericalDis

Compute the spherical distribution of leaf zenith angle.
interEllip

Compute the fraction leaf area given leaf angle intervals (in degree) and the parameters of ellipsoidal function.
interEllipR

Compute the fraction leaf area for rotated-ellipsoidal function given leaf angle intervals (in degree) and the parameters.
interPlagiophile

Compute the fraction leaf area of Plagiophile distribution given leaf angle intervals (in degree).
computeTrig

Compute the parameter of Verhoef's leaf angle distribution given leaf angle mearuements.
ellipsoidalDis

Compute the ellipsoidal distribution of leaf zenith angle.
planophileDis

Compute the planophile distribution of leaf zenith angle.
computeGEllip

Compute the G value given lamda (the parameter of ellipsoidal function) and beam direction.
computeLambda

Compute the parameter of ellipsoidal function given leaf angle distribution mearuements.
extremophileDis

Compute the extremophile distribution of leaf zenith angle.
ellipsoidalRDis

Compute the rotated ellipsoidal distribution of leaf zenith angle.
estBeta

Estimate the parameters of Beta distribution given leaf angle measurements.
intervalTrig

Compute the fraction leaf area given leaf angle intervals (in degree) and the parameters of Verhoef's leaf angle distribution function.
interBeta

Compute the fraction leaf area given leaf angle intervals (in degree) and the parameters of Beta function.
interSpherical

Compute the fraction leaf area of Spherical function given leaf angle intervals (in degree).
interUniform

Compute the fraction leaf area of Uniform distribution given leaf angle intervals (in degree).
sysAziDis

Compute the symmetric distribution of leaf azimuth angle.
interPlanophile

Compute the fraction leaf area of Planophile distribution given leaf angle intervals (in degree).
plotdensity

Plot the density of leaf area given leaf angle measurements.
plagiophileDis

Compute the plagiophile distribution of leaf zenith angle.
uniformDis

Compute the uniform distribution of leaf zenith angle.