unfold_idx: Fold and Unfold a dfidx object

In dfidx: Indexed Data Frames

Fold and Unfold a dfidx object

Description

fold_idx takes a dfidx object, includes the indexes as stand alone columns, remove the idx column and return a data frame, with an ids attribute that contains the informations about the indexes. fold_idx performs the opposite operation.

Usage

unfold_idx(x)

fold_idx(x, pkg = NULL, sort = FALSE)

Arguments

x	a dfidx object
pkg	if not NULL, this argument is passed to dfidx
sort	a boolean, whether the resulting dfidx object should be sorted or not

Value

a data frame for the unfold_dfidx function, a dfidx object for the fold_dfidx function

Author(s)

Yves Croissant

Examples

mn <- dfidx(munnell, idx = c(region = "state", "year"), position = 3, name = "index")
mn2 <- unfold_idx(mn)
attr(mn, "ids")
mn3 <- fold_idx(mn2)
identical(mn, mn3)

dfidx documentation built on Aug. 8, 2025, 7:10 p.m.