mlr_graphs_branching
Branch Between Alternative Paths
Create a multiplexed graph.
Usage
pipeline_branch(graphs, prefix_branchops = "", prefix_paths = FALSE)
Arguments
- graphs
list
ofGraph
Multiple 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 toPipeOpBranch
andPipeOpUnbranch
id. 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 thePipeOp
IDs 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")
# }