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Last data update: 2014.03.03

R: Two methods for fitting a leaf angle distribution

loglikfit

R Documentation

Two methods for fitting a leaf angle distribution

Description

Two functions that report the chi-squared statistic, or the log-likelihood of a particular distribution, given a sample of leaf angles. No need to be called by the user. Simply use fitdistribution, which finds the parameters of the distribution by minimizing either chi-squared or log-likelihood.

Usage

chisqfit(angles, distribution, distpars=NA, ...)
loglikfit(angles, distribution, distpars=NA, ...)

Arguments

`angles`	Vector of angles (0-90 degrees).
`distribution`	One of the nine distributions. See `angledist`
`distpars`	Vector of parameters
`...`	Further parameters passed to ftheta.

Author(s)

Remko Duursma

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, 106-122.