Write commands to reduce several targets down to one.

Deprecated on 2019-05-16. Use drake_plan() transformations instead. See https://books.ropensci.org/drake/plans.html#large-plans for the details.

Usage

reduce_plan(
  plan = NULL,
  target = "target",
  begin = "",
  op = " + ",
  end = "",
  pairwise = TRUE,
  append = FALSE,
  sep = "_"
)

Arguments

plan

Workflow plan data frame of prespecified targets.

target

Name of the new reduced target.

begin

Character, code to place at the beginning of each step in the reduction.

op

Binary operator to apply in the reduction

end

Character, code to place at the end of each step in the reduction.

pairwise

Logical, whether to create multiple new targets, one for each pair/step in the reduction (TRUE), or to do the reduction all in one command.

append

Logical. If TRUE, the output will include the original rows in the plan argument. If FALSE, the output will only include the new targets and commands.

sep

Character scalar, delimiter for creating new target names.

Value

A workflow plan data frame that aggregates multiple prespecified targets into one additional target downstream.

Details

Creates a new workflow plan data frame with the commands to do a reduction (i.e. to repeatedly apply a binary operator to pairs of targets to produce one target).

See also

drake_plan()