rsurvstat (version 0.1.4)

.transpose: Transform a nested dataframe to / from a row by row list

Description

Data frames are column lists, which may have nested dataframes. This function transforms a data frame to row based list with named sub lists with one entry per dataframe column (a row_list). It alternative converts a row_list back to a nested data frame

Usage

.transpose(x, ..., .fix = ".")

Value

either a dataframe or a list of class row_list representing the dataframe as a list of named lists.

Arguments

x

a data.frame or row_list

...

not used

.fix

collapse or expand names in redundant multi-level row_lists. Either FALSE or a string to join or split the names of the multi-level list by

Unit tests

# create a test nested data frame:
mtcars_nest = datasets::mtcars 
  dplyr::mutate(name = rownames(.)) 
  tidyr::nest(by_carb = -c(cyl,gear,carb)) 
  tidyr::nest(by_cyl_and_gear = -c(cyl,gear))
mtcars_list = mtcars_nest 
mtcars_nest2 = mtcars_list 
testthat::expect_equal(mtcars_nest, mtcars_nest2)