R: Convert R Object to a Descriptive String

as_short_string {mlr3misc} | R Documentation

## Convert R Object to a Descriptive String

### Description

This function is intended to be convert any R object to a short descriptive string, e.g. in `base::print()` functions.

The following rules apply:

- if `x` is `atomic()` with length 0 or 1: printed as-is.

- if `x` is `atomic()` with length greater than 1, `x` is collapsed with `","`, and the resulting string is truncated to `trunc_width` characters.

- if `x` is an expression: converted to character.

- Otherwise: the class is printed.

If `x` is a list, the above rules are applied (non-recursively) to its elements.

### Usage

    as_short_string(x, width = 30L, num_format = "%.4g")

### Arguments

`x` | (`any`) Arbitrary object.
`width` | (`integer(1)`) Truncate strings to width `width`.
`num_format` | (`character(1)`) Used to format numerical scalars via `base::sprintf()`.

### Value

(`character(1)`).

### Examples

    as_short_string(list(a = 1, b = NULL, "foo", c = 1:10))

[Package mlr3misc version 0.10.0 Index]