ref: Display tree of references

In lobstr: Visualize R Data Structures with Trees

Description

This tree display focusses on the distinction between names and values. For each reference-type object (lists, environments, and optional character vectors), it displays the location of each component. The display shows the connection between shared references using a locally unique id.

Usage

ref(..., character = FALSE)

Arguments

...	One or more objects
character	If TRUE, show references from character vector in to global string pool

See Also

Other object inspectors: ast, sxp

Examples

x <- 1:100
ref(x)

y <- list(x, x, x)
ref(y)
ref(x, y)

e <- new.env()
e$e <- e
e$x <- x
e$y <- list(x, e)
ref(e)

# Can also show references to global string pool if requested
ref(c("x", "x", "y"))
ref(c("x", "x", "y"), character = TRUE)

Example output

[1:0x5626ce39ccb8] <int> 
█ [1:0x5626ceb18638] <list> 
├─[2:0x5626ce39ccb8] <int> 
├─[2:0x5626ce39ccb8] 
└─[2:0x5626ce39ccb8] 
[1:0x5626ce39ccb8] <int> 
 
█ [2:0x5626ceb18638] <list> 
├─[1:0x5626ce39ccb8] 
├─[1:0x5626ce39ccb8] 
└─[1:0x5626ce39ccb8] 
█ [1:0x5626ce0722b0] <env> 
├─x = [2:0x5626ce39ccb8] <int> 
├─y = █ [3:0x5626cea71508] <list> 
│     ├─[2:0x5626ce39ccb8] 
│     └─[1:0x5626ce0722b0] 
└─e = [1:0x5626ce0722b0] 
[1:0x5626cfec31b8] <chr> 
█ [1:0x5626cfec3028] <chr> 
├─[2:0x5626cd920ae8] <string: "x"> 
├─[2:0x5626cd920ae8] 
└─[3:0x5626cda16608] <string: "y"> 

lobstr documentation built on July 3, 2019, 1:05 a.m.