Skip to contents

Insert step

Source: R/aliases.R
pipe_insert.Rd

Insert step

Usage

pipe_insert_after(pip, afterStep, step, ...)

pipe_insert_before(pip, beforeStep, step, ...)

Arguments

pip

Pipeline object

afterStep

string name of step after which to insert

step

string name of step to insert

...

further arguments passed to pipe_add()

beforeStep

string name of step before which to insert

Value

returns the Pipeline object invisibly

Methods

  • pipe_insert_after: insert step after a certain step of the pipeline

  • pipe_insert_before: insert step before a certain step of the pipeline

Examples

# pipe_insert_after
p <- pipe_new("pipe", data = 1)
pipe_add(p, "f1", \(x = 1) x)
pipe_add(p, "f2", \(x = ~f1) x)
pipe_insert_after(p, "f1", step = "after_f1", \(x = ~f1) x)
p
#>        step depends    out keepOut    group  state
#>      <char>  <list> <list>  <lgcl>   <char> <char>
#> 1:     data         [NULL]   FALSE     data    New
#> 2:       f1         [NULL]   FALSE       f1    New
#> 3: after_f1      f1 [NULL]   FALSE after_f1    New
#> 4:       f2      f1 [NULL]   FALSE       f2    New

# insert_before
pipe_insert_before(p, "f2", step = "before_f2", \(x = ~f1) 2 * x)
p
#>         step depends    out keepOut     group  state
#>       <char>  <list> <list>  <lgcl>    <char> <char>
#> 1:      data         [NULL]   FALSE      data    New
#> 2:        f1         [NULL]   FALSE        f1    New
#> 3:  after_f1      f1 [NULL]   FALSE  after_f1    New
#> 4: before_f2      f1 [NULL]   FALSE before_f2    New
#> 5:        f2      f1 [NULL]   FALSE        f2    New