BetaDis                 Compute the Beta distribution of leaf zenith
                        angle.
Falster                 Leaf angle distribution measurements provided
                        by D.S. Falster
LADdensity              Retrieve the density of leaf area given leaf
                        angle measurements.
Pisek                   Leaf angle distribution measurements provided
                        by Jan Pisek
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.
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.
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.
computeTrig             Compute the parameter of Verhoef's leaf angle
                        distribution given leaf angle mearuements.
ellipsoidalDis          Compute the ellipsoidal 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.
extremophileDis         Compute the extremophile distribution of leaf
                        zenith angle.
interBeta               Compute the fraction leaf area given leaf angle
                        intervals (in degree) and the parameters of
                        Beta function.
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.
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).
interPlagiophile        Compute the fraction leaf area of Plagiophile
                        distribution given leaf angle intervals (in
                        degree).
interPlanophile         Compute the fraction leaf area of Planophile
                        distribution given leaf angle intervals (in
                        degree).
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).
intervalTrig            Compute the fraction leaf area given leaf angle
                        intervals (in degree) and the parameters of
                        Verhoef's leaf angle distribution function.
plagiophileDis          Compute the plagiophile distribution of leaf
                        zenith angle.
planophileDis           Compute the planophile distribution of leaf
                        zenith angle.
plotdensity             Plot the density of leaf area given leaf angle
                        measurements.
selectClassic           Retrieve the density of leaf area given leaf
                        angle measurements.
sphericalDis            Compute the spherical distribution of leaf
                        zenith angle.
sysAziDis               Compute the symmetric distribution of leaf
                        azimuth angle.
uniformDis              Compute the uniform distribution of leaf zenith
                        angle.
