get_forecast_for {darksky}

Retrieve weather data for a specific place/time

Description

Query for a specific time, past or future (for many places, 60 years in the past to 10 years in the future).

Usage

get_forecast_for(latitude, longitude, timestamp, units = "us",
  language = "en", exclude = NULL, add_json = FALSE,
  add_headers = FALSE, ...)

Arguments

latitude

forecast latitude (character, decimal format)

longitude

forecast longitude (character, decimal format)

timestamp

should either be a UNIX time (that is, seconds since midnight GMT on 1 Jan 1970) or a string formatted as follows: [YYYY]-[MM]-[DD]T[HH]:[MM]:[SS] (with an optional time zone formatted as Z for GMT time or [+|-][HH][MM] for an offset in hours or minutes). For the latter format, if no timezone is present, local time (at the provided latitude and longitude) is assumed. (This string format is a subset of ISO 8601 time. An as example, 2013-05-06T12:00:00-0400.) If an R Date or POSIXct object is passed in it will be converted into the proper format.

units

return the API response in units other than the default Imperial unit

language

return text summaries in the desired language

exclude

exclude some number of data blocks from the API response. This is useful for reducing latency and saving cache space. This should be a comma-separated string (without spaces) including one or more of the following: (currently, minutely, hourly, daily, alerts, flags). Crafting a request with all of the above blocks excluded is exceedingly silly and not recommended. Setting this parameter to NULL (the default) does not exclude any parameters from the results.

add_json

add the raw JSON response to the object?

add_headers

add the return headers to the object?

...

pass through parameters to httr::GET (e.g. to configure ssl options or proxies)

Details

If you wish to have results in something besides Imperial units, set units to one of (si, ca, uk). Setting units to auto will have the API select the relevant units automatically, based on geographic location. This value is set to us (Imperial) units by default.

If you wish to have text summaries presented in a different language, set language to one of (ar, bs, de, es, fr, it, nl, pl, pt, ru, sv, tet, tr, x-pig-latin, zh). This value is set to en (English) by default.

See the Options section of the official Dark Sky API documentation for more information.

Value

an darksky object that contains the original JSON response object (optionally), a list of named tbl_df data.frame objects corresponding to what was returned by the API and (optionally) relevant response headers (cache-control, expires, x-forecast-api-calls, x-response-time).

Examples

## Not run: 
tmp <- get_forecast_for(37.8267,-122.423, "2013-05-06T12:00:00-0400")

## End(Not run)