intervalTrig function

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

intervalTrig(AngleLower, AngleUpper, ap, bp)

Arguments

• AngleLower: The lower limit of leaf angle intervals in degree.
• AngleUpper: The upper limit of leaf angle intervals in degree.
• ap: One of the parameters of Verhoef's leaf angle distribution function.
• bp: One of the parameters of Verhoef's leaf angle distribution function.

Returns

Compute the fraction leaf area of Verhoef's leaf angle distribution function.

Examples

intervalTrig(40,50, -0.325, -0.173)

References

Wang, W. M., Li, Z. L., & Su, H. B. (2007). Comparison of leaf angle distribution functions: effects on extinction coefficient and fraction of sunlit foliage. Agricultural and Forest Meteorology, 143(1), 106-122.

Author(s)

Wei-Min Wang (wmwang AT gmail.com)