eff_num_func_no_d
eff_num_func_no_d(adf_freq, q = 1)A data frame of functional "frequencies" - i.e. f_i/sum(f_i)
Order of hill number used for index. Defaults to q=1, as in Shannon Diversity
Returns a verctor of effective or standardized effective number of functions
Takes a data frame, with functions standardized against total level of function in their replicate as columns and replicates as rows. Returns the effective number of functions using the appropriate method. See Chao et al. 2019 or Jost 2006 for details. Does not adjust for correlation between functions.
Chao, A., Chiu, C.-H., Villéger, S., Sun, I.-F., Thorn, S., Lin, Y.-C., Chiang, J.-M. and Sherwin, W. B. 2019. An attribute-diversity approach to functional diversity, functional beta diversity, and related (dis)similarity measures. Ecological Monographs. 89: e01343.
Jost, L. 2006. Entropy and diversity. Oikos 113(2): 363-375.
Hill, M. 1973. Diversity and evenness: A unifying notation and its consequences. Ecology 54: 427-432.