getIn: Retrieve values from nested named lists

In fsbrain: Managing and Visualizing Brain Surface Data

Retrieve values from nested named lists

Description

Retrieve values from nested named lists

Usage

getIn(named_list, listkeys, default = NULL)

Arguments

named_list	a named list
listkeys	vector of character strings, the nested names of the lists
default	the default value to return in case the requested value is 'NULL'.

Value

the value at the path through the lists, or ‘NULL' (or the ’default') if no such path exists.

Examples

   data = list("regions"=list("frontal"=list("thickness"=2.3, "area"=2345)));
   getIn(data, c("regions", "frontal", "thickness"));       # 2.3
   getIn(data, c("regions", "frontal", "nosuchentry"));     # NULL
   getIn(data, c("regions", "nosuchregion", "thickness"));  # NULL
   getIn(data, c("regions", "nosuchregion", "thickness"), default=14);  # 14

fsbrain documentation built on July 9, 2023, 7:12 p.m.