R: Get all unique cases of a list field by expression

list.cases {rlist} | R Documentation

## Get all unique cases of a list field by expression

### Description

Get all unique cases of a list field by expression

### Usage

    list.cases(.data, expr, simplify = TRUE, sorted = TRUE)

### Arguments

`.data` | A `list` or `vector`
`expr` | A lambda expression. The function will returns all cases of the elements if `expr` is missing.
`simplify` | `logical`. Should atomic vectors be simplified by `unlist`?
`sorted` | `logical`. Should the cases be sorted in ascending order?

### Examples

    x <- list(p1 = list(type='A',score=list(c1=10,c2=8)),
           p2 = list(type='B',score=list(c1=9,c2=9)),
           p3 = list(type='B',score=list(c1=9,c2=7)))
    list.cases(x,type)
    list.cases(x,mean(unlist(score)))

    foo <- list(x = LETTERS[1:3], y = LETTERS[3:5])
    list.cases(foo)

[Package rlist version 0.4.6.1 Index]