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Create enriched flat value table with paths

Source: R/tt_export.R
tsv_io.Rd

This function creates a flat tabular file of cell values and corresponding paths via path_enriched_df(). It then writes that data frame out as a tsv file.

Usage 

export_as_tsv(
  tt,
  file = NULL,
  path_fun = collapse_path,
  value_fun = collapse_values
)

import_from_tsv(file)

Arguments

tt

(TableTree or related class)
a TableTree object representing a populated table.

file

(string)
the path of the file to written to or read from.

path_fun

(function)
function to transform paths into single-string row/column names.

value_fun

(function)
function to transform cell values into cells of a data.frame. Defaults to collapse_values, which creates strings where multi-valued cells are collapsed together, separated by |.

Value

  • export_as_tsv returns NULL silently.

  • import_from_tsv returns a data.frame with re-constituted list values.

Details

By default (i.e. when value_func is not specified, list columns where at least one value has length > 1 are collapsed to character vectors by collapsing the list element with "|".

Note

There is currently no round-trip capability for this type of export. You can read values exported this way back in via import_from_tsv but you will receive only the data.frame version back, NOT a TableTree.

See also

path_enriched_df() for the underlying function that does the work.