as.data.frame.openaq_countries_list: Method for converting openaq_countries_list to data frame.

In openaq: Access Air Quality Data from the 'OpenAQ' API

Method for converting openaq_countries_list to data frame.

Description

Method for converting openaq_countries_list to data frame.

Usage

## S3 method for class 'openaq_countries_list'
as.data.frame(x, row.names = NULL, optional = FALSE, ...)

Arguments

x	A list of countries as returned from list_countries.
row.names	NULL or a character vector giving the row names for the data frame. Missing values are not allowed.
optional	logical. If TRUE, setting row names and converting column names (to syntactic names: see make.names) is optional. Note that all of R's base package as.data.frame() methods use optional only for column names treatment, basically with the meaning of data.frame(*, check.names = !optional). See also the make.names argument of the matrix method.
...	additional arguments to be passed to or from methods.

Value

A data frame class of the countries results, with the following columns:

id

Numeric. The countries identifier

name

Character. Then English name of the country.

code

Character. The ISO-3166 Alpha 2 identifier for the country.

datetime_first

POSIXct. The datetime of the first measurement value available in the country.

datetime_last

POSIXct. The datetime of the last measurement value available in the country.

parameter_ids

Character. A comma delimited list of parameter ids that are measured within the country.

parameter_names

Character. a comma delimited list of parameter names and their units that are measured within the country.

The data frame also includes a meta attribute from the original openaq_countries_list.

Examples

countries <- list_countries(as_data_frame = FALSE)
as.data.frame(countries)

openaq documentation built on March 19, 2026, 5:08 p.m.