Package 'exoplanets'

Retrieve Data from NASAs Exoplanet Archive

Description

A simple interface for accessing exoplanet data. At the bare minimum, a table name is required. Tables names are documented in the 'tableinfo' dataset.

Usage

exoplanets(table, columns = NULL, limit = NULL, format = "csv")

Arguments

table	A table name, see 'tableinfo'.
columns	A vector of valid column names, by default will return all default columns, see 'tableinfo'.
limit	Number of rows to return. If NULL, returns all data in the table.
format	Desired format, either csv, tsv, or json.

Details

At one time, this package used the Exoplanet Archive Application Programming Interface (API). Since then, a handful of tables have been transitioned to the Table Access Protocol (TAP) service. More tables will be transitioned to TAP and as such, this package only supports queries from TAP. For more information, you can read https://exoplanetarchive.ipac.caltech.edu/docs/exonews_archive.html#29April2021.

Value

A data.frame if format="csv" or format="tsv". A list if format="json".

Source

https://exoplanetarchive.ipac.caltech.edu/

See Also

tableinfo

Examples

if (interactive()) {
  # request all default columns from the `ps` table
  exoplanets("ps")

  # request the planet name and discovery method from the `ps` table
  exoplanets("ps", c("pl_name", "discoverymethod"))

  # request the first 5 rows from the `keplernames` table
  exoplanets("keplernames", limit = 5)

  # request in json format (returns list)
  exoplanets("ps", c("pl_name", "discoverymethod"), format = "json")

}

---

Clear the exoplanets cache

Description

Forget past results and reset the exoplanets cache.

Usage

forget_exoplanets()

Examples

if (interactive()) {
  system.time(exoplanets("k2names"))
  system.time(exoplanets("k2names"))
  forget_exoplanets()
  system.time(exoplanets("k2names"))
}

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Table Information

Description

This dataset provides table information for NASA's Exoplanet Archive TAP service. In particular, the table name, columns, and column descriptions are provided.

Usage

tableinfo

Format

An object of class tbl_df (inherits from tbl, data.frame) with 546 rows and 13 columns.

Source

https://exoplanetarchive.ipac.caltech.edu/docs/TAP/usingTAP.html

Examples

tableinfo

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