pias_class: Make a PIAS for elementary aggregates in a classification
In marberts/ppd: Prices Production and Development

Description Usage Arguments Details Value See Also Examples

Make a list that gives the aggregation structure for EAs in a classification in which each digits of the classification corresponds to a level of aggregation (like NAICS or NAPCS).

1	pias_class(x)

`x`	A vector of classifications for elementary aggregates (e.g., 6 digit NAICS).

This function takes the elements of x and makes a list that groups each element by all left-to-right combinations of all but the last characters in x. For example, if x is a vector all 4-digits NAICS, then the result will be a list that groups each 4-digit NAICS into 3-digit, 2-digit, and 1-digit NAICS.

A list.

See pias_matrix for turning a classification into an aggregation structure.

eas <- c('111', '112', '121', '122', '123')
pias_class(eas)

# Make some weights
w <- runif(5)
names(w) <- eas

# Make a PIAS matrix
pm <- pias_matrix(pias_class(eas), w)