type_sum: Provide a succinct summary of an object

In pillar: Coloured Formatting for Columns

Description

\Sexpr[results=rd, stage=render]{pillar:::lifecycle("questioning")}

type_sum() gives a brief summary of object type. Objects that commonly occur in a data frame should return a string with four or less characters. For most inputs, the argument is forwarded to vctrs::vec_ptype_abbr().

obj_sum() also includes the size of the object if is_vector_s3() is TRUE.

Usage

type_sum(x)

obj_sum(x)

is_vector_s3(x)

Arguments

x	an object to summarise. Generally only methods of atomic vectors and variants have been implemented.

Lifecycle

type_sum() is in the "questioning" stage, because vctrs::vec_ptype_abbr() provides essentially the same functionality based on a robust framework. The generic will remain available for a while. Users and implementers are encouraged to consider vctrs::vec_ptype_abbr() once it becomes stable.

Examples

obj_sum(1:10)
obj_sum(matrix(1:10))
obj_sum(Sys.Date())
obj_sum(Sys.time())
obj_sum(mean)

Example output

[1] "int [10]"
[1] "int [10 x 1]"
[1] "date [1]"
[1] "dttm [1]"
[1] "fn"

pillar documentation built on June 29, 2019, 5:02 p.m.