Convert a nested list structure to a data.tree structure

Convert a nested list structure to a data.tree structure

# S3 method for class 'list'
as.Node(
  x,
  mode = c("simple", "explicit"),
  nameName = "name",
  childrenName = "children",
  nodeName = NULL,
  interpretNullAsList = FALSE,
  check = c("check", "no-warn", "no-check"),
  ...
)

FromListExplicit(
  explicitList,
  nameName = "name",
  childrenName = "children",
  nodeName = NULL,
  check = c("check", "no-warn", "no-check")
)

FromListSimple(
  simpleList,
  nameName = "name",
  nodeName = NULL,
  interpretNullAsList = FALSE,
  check = c("check", "no-warn", "no-check")
)

Arguments

x

The list to be converted.

mode

How the list is structured. "simple" (the default) will interpret any list to be a child. "explicit" assumes that children are in a nested list called childrenName

nameName

The name of the element in the list that should be used as the name, can be NULL if mode = explicit and the children lists are named, or if an automatic name (running number) should be assigned

childrenName

The name of the element that contains the child list (applies to mode 'explicit' only).

nodeName

A name suggestion for x, if the name cannot be deferred otherwise. This is for example the case for the root with mode explicit and named lists.

interpretNullAsList

If TRUE, then NULL-valued lists are interpreted as child nodes. Else, they are interpreted as attributes. This has only an effect if mode is "simple".

check

Either

• "check": if the name conformance should be checked and warnings should be printed in case of non-conformance (the default)

• "no-warn": if the name conformance should be checked, but no warnings should be printed in case of non-conformance (if you expect non-conformance)

• "no-check" or FALSE: if the name conformance should not be checked; use this if performance is critical. However, in case of non-conformance, expect cryptic follow-up errors

...

Any other argument to be passed to generic sub implementations

explicitList

A list in which children are in a separate nested list called childrenName.

simpleList

A list in which children are stored as nested list alongside other attributes. Any list is interpreted as a child Node

See also

Other as.Node: as.Node.data.frame(), as.Node.dendrogram(), as.Node.phylo(), as.Node.rpart(), as.Node()

Examples

kingJosephs <- list(name = "Joseph I",
                    spouse = "Mary",
                    born = "1818-02-23",
                    died = "1839-08-29",
                    children = list(
                                    list(name = "Joseph II",
                                         spouse = "Kathryn",
                                         born = "1839-03-28",
                                         died = "1865-12-19"),
                                    list(name = "Helen",
                                         born = "1840-17-08",
                                         died = "1845-01-01")
                                    )
                   )
FromListExplicit(kingJosephs)
#>       levelName
#> 1 Joseph I     
#> 2  ¦--Joseph II
#> 3  °--Helen    

kingJosephs <- list(head = "Joseph I",
                    spouse = "Mary",
                    born = "1818-02-23",
                    died = "1839-08-29",
                    list(head = "Joseph II",
                         spouse = "Kathryn",
                         born = "1839-03-28",
                         died = "1865-12-19"),
                    list(head = "Helen",
                         born = "1840-17-08",
                         died = "1845-01-01")       
                   )
FromListSimple(kingJosephs, nameName = "head")
#>       levelName
#> 1 Joseph I     
#> 2  ¦--Joseph II
#> 3  °--Helen    

kingJosephs <- list(spouse = "Mary",
                    born = "1818-02-23",
                    died = "1839-08-29",
                    `Joseph II` = list(spouse = "Kathryn",
                                       born = "1839-03-28",
                                       died = "1865-12-19"),
                    Helen = list(born = "1840-17-08",
                                 died = "1845-01-01")
                                 
                   )
FromListSimple(kingJosephs, nodeName = "Joseph I")
#>       levelName
#> 1 Joseph I     
#> 2  ¦--Joseph II
#> 3  °--Helen