unfold_idx | R Documentation |
fold_idx
takes a dfidx, 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
unfold_idx(x) fold_idx(x, pkg = NULL)
x |
a |
pkg |
if not |
a data.frame
for the unfold_dfidx
function, a dfidx
object for the fold_dfidx
function
Yves Croissant
if (requireNamespace("AER")){ data("TravelMode", package = "AER") TM <- dfidx(TravelMode) TM2 <- unfold_idx(TM) attr(TM2, "ids") TM3 <- fold_idx(TM2) identical(TM, TM3) }
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