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Create a persistent chain from a base Daf and a new Daf

Source: R/complete.R
complete_chain.Rd

Immediately after creating an empty disk-based new_daf, chain it with a disk-based base_daf and return the new chain. If axes and/or data are specified, the new_daf will be chained on top of a view of the base_daf.

Usage

complete_chain(
  base_daf,
  new_daf,
  name = NULL,
  axes = NULL,
  data = NULL,
  absolute = FALSE
)

Arguments

base_daf

A Daf object to use as the base (read-only) data

new_daf

A Daf object to use as the new (writable) data on top of the base

name

Optional name for the chained Daf object

axes

Optional named list specifying axes to expose from the base (same format as viewer)

data

Optional named list specifying data to expose from the base (same format as viewer)

absolute

If TRUE, store the absolute path to the base_daf. If FALSE (default), store a relative path for portability.

Value

A writable Daf object chaining the base and new data

Details

This will set the base_daf_repository scalar property of the new_daf to point at the base_daf, and if view axes or data were specified, the base_daf_view as well. It should therefore be possible to recreate the chain by calling complete_daf in the future.

By default, the stored base path in the new_daf will be the relative path to the base_daf, for the common case where a group of repositories is stored under a common root. This allows the root to be renamed or moved and still allow complete_daf to work.

See the Julia documentation for details.