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Update a rollup from a single leaf vertex

Source: R/rollup.R
update_rollup.Rd

update_rollup() performs a minimal update of a data set assuming a single leaf element property has changed. It performs updates along the path from that vertex to the root. There should be no difference in the output from calling rollup() again. update_rollup() is perhaps more efficient and useful in an interactive context.

Usage

update_rollup(tree, ds, vertex, update)

Arguments

tree

igraph directed graph that is a valid single-rooted in-tree and whose vertex names are keys from the data set

ds

data set to be updated; can be any object

vertex

The start vertex

update

function called at each vertex as update(ds, parent_key, child_keys)

Value

updated input data set

Examples

update_rollup(wbs_tree, wbs_table, igraph::V(wbs_tree)["3.2"],
  update = function(d, p, c) {
    if (length(c) > 0)
      d[d$id == p, c("work", "budget")] <-
        apply(d[is.element(d$id, c), c("work", "budget")], 2, sum)
      d
  }
)
#>     id  pid                    name work budget
#> 1  top <NA> Construction of a House   NA     NA
#> 2    1  top                Internal   NA     NA
#> 3    2  top              Foundation   NA     NA
#> 4    3  top                External 30.4  83500
#> 5  1.1    1              Electrical 11.8  25000
#> 6  1.2    1                Plumbing 33.8  61000
#> 7  2.1    2                Excavate 18.2  37000
#> 8  2.2    2          Steel Erection  5.8   9000
#> 9  3.1    3            Masonry Work 16.2  62000
#> 10 3.2    3       Building Finishes 14.2  21500