Das Gupta equation 5.36 for a single population: Decomposes cross-classified population structures into a set of symmetric proportions indicating contribution of individual structural variables.
split_popstr(x, id_vars, nvar)
inputted data.frame is returned with the addition of variables for each of the the cross-classified variables representing the contribution to the population size.
dataframe consisting of one population, including variables indicating cross-classified structure, and a variable indicating size of each cell
character vector of variables indicating cross-classified structure.
variable name (character string) containing cell sizes