mlr_graphs_branching
Branch Between Alternative Paths
Create a multiplexed graph.
Usage
pipeline_branch(graphs, prefix_branchops = "", prefix_paths = FALSE)Arguments
- graphs
listofGraphMultiple graphs, possibly named. They all must have exactly one output. If any of the arguments are named, then all must have unique names.- prefix_branchops
character(1)Optional id prefix to prepend toPipeOpBranchandPipeOpUnbranchid. Their resulting IDs will be"[prefix_branchops]branch"and"[prefix_branchops]unbranch". Default is"".- prefix_paths
logical(1)|character(1)Whether to add prefixes to graph IDs when performing gunion. Can be helpful to avoid ID clashes in resulting graph. DefaultFALSE. If this isTRUE, the prefixes are taken from the names of the input arguments if present or"poX"where X counts up. If this is acharacter(1), it is a prefix that is added to thePipeOpIDs additionally to the input argument list.
Value
Examples
# NOT RUN {
library("mlr3")
po_pca = po("pca")
po_nop = po("nop")
branches = pipeline_branch(list(pca = po_pca, nothing = po_nop))
# gives the same as
branches = c("pca", "nothing")
po("branch", branches) %>>%
gunion(list(po_pca, po_nop)) %>>%
po("unbranch", branches)
pipeline_branch(list(pca = po_pca, nothing = po_nop),
prefix_branchops = "br_", prefix_paths = "xy_")
# gives the same as
po("branch", branches, id = "br_branch") %>>%
gunion(list(xy_pca = po_pca, xy_nothing = po_nop)) %>>%
po("unbranch", branches, id = "br_unbranch")
# }