Provides extended data frames, with a special data frame column which contains two indexes, with potentially a nesting structure.
dfidx is a small R package which is intended to deal efficiently
with data frames when each observation is identified by a combination
of values of two variables (indexes). dfidx exports the function
dfidx which takes as main argument a data frame and returns a
dfidx object and the idx/idx_name functions which respectively
return one or all of the indexes and their names. Methods are provided
for R's extractors.
dfidx is on CRAN. Use : install.packages("dfidx").
To install the developping version, use :
remotes::install_github("ycroissant/dfidx").