safely_map_dfr: Apply a function to each element of a vector safely

Description Usage Arguments Details Value Examples

View source: R/map_safely.R

Description

Denne funksjonen er en wrapper rundt funksjonene map_dfr og safely fra purrr.

Usage

1
safely_map_dfr(.x, .f, ..., .id = NULL)

Arguments

.x

A list or atomic vector.

.f

A function, formula, or vector (not necessarily atomic).

If a function, it is used as is.

If a formula, e.g. ~ .x + 2, it is converted to a function. There are three ways to refer to the arguments:

  • For a single argument function, use .

  • For a two argument function, use .x and .y

  • For more arguments, use ..1, ..2, ..3 etc

This syntax allows you to create very compact anonymous functions.

If character vector, numeric vector, or list, it is converted to an extractor function. Character vectors index by name and numeric vectors index by position; use a list to index by position and name at different levels. If a component is not present, the value of .default will be returned.

...

Additional arguments passed on to the mapped function.

.id

Either a string or NULL. If a string, the output will contain a variable with that name, storing either the name (if .x is named) or the index (if .x is unnamed) of the input. If NULL, the default, no variable will be created.

Only applies to _dfr variant.

Details

Se hjelpeside for purrr::map for doks.

Value

Funksjonen returnerer et listeobjekt med to elementer. $result inneholder en data.frame med resultat for de elementene som kjørte suksessfullt, mens $error er en liste med samme lengde som .x. Elementene i listen er NULL for de elementene i .x som kjørte uten feil og feilobjektet for de som feilet.

Examples

1
a <- safely_map_dfr(c(-1, 1), ~ data.frame(a = rnorm(.)))

eysteinmeese91/magimisc documentation built on Oct. 3, 2020, 10:10 a.m.