rwebstat (version 1.1.1)

w_data: Request data from a Webstat dataset.

Description

Request data from a Webstat dataset.

Usage

w_data(
  dataset_name = NA,
  series_name = NA,
  startPeriod = NA,
  endPeriod = NA,
  firstNObs = NA,
  lastNObs = NA,
  language = "fr",
  format = "json",
  base_url = "https://api.webstat.banque-france.fr/webstat-",
  client_ID
)

Value

A dataframe with metadata attributes (that you can access with the w_meta() function)

Arguments

dataset_name

Optional. String (must be entered between quotes.) The datasets codes can be determined using the w_datasets() function.

series_name

Optional. String (must be entered between quotes.) The series names can be found using the w_series(dataset) function. Wildcarding is supported by replacing one (or several) dimensions by the "*" character. At least one dimension must be specified. Example: "M.USD.EUR.SP00.E" : US dollar exchange rate against the Euro, monthly Example: "*.*.EUR.SP00.E" : All available exchange rates against the Euro, all available frequencies

startPeriod

Optional. String. Start period (inclusive). ISO8601 (e.g. 2014-01) or SDMX reporting period (e.g. 2014-Q3).

endPeriod

Optional. String. End period (inclusive). ISO8601 (e.g. 2014-01-01) or SDMX reporting period (e.g. 2014-Q3).

firstNObs

Optional. String or Numeric. Maximum number of observations starting from the first observation

lastNObs

Optional. String or Numeric. Maximum number of observations counting back from the most recent observation

language

Optional. String. Defaults to "fr" (French). The only other available option is "en" (English). Determines the language of the metadata. Your Webstat "App" must be subscribed to the API in this language (or both languages) or you'll get a 501 http error.

format

Optional. String. Defaults to "json".The only other available option is "csv". The "json" option gives a better and cleaner results (POSIX dates, etc). "csv" files are smaller and could be used to request large datasets that generate timeouts. Dataframes might then have to be cleaned manually.

base_url

Optional. String. Defaults to "https://api.webstat.banque-france.fr/webstat-". For internal testing purposes only.

client_ID

Optional. String. If you do not specify it when calling the function, it will check if a global variable called "webstat_client_ID" exists and use it. If not, you will be prompted. The easiest way is to save the client ID as a string in a "webstat_client_ID" global variable.

Warning

A full dataset download will usually take a very long time and might time out and fail. Please use the available arguments to restrict your data selection.

Identification

You should declare your Webstat client ID in a global "webstat_client_ID" variable. Alternatively, you can enter your client ID as a parameter or enter it when prompted.

Period formats

• Daily/Business YYYY-MM-DD

• Monthly YYYY-MM

• Quarterly YYYY-Q[1-4]

• Annual YYYY

Examples

if (FALSE) {
## Request the US Dollar monthly exchange rates in Euro
w_data(dataset_name = "EXR", series_name = "M.USD.EUR.SP00.E")
or
w_data("EXR.M.USD.EUR.SP00.E")

## Request the US Dollar monthly exchange rates in Euro, from May 2017 to April 2018
w_data(
  dataset_name = "EXR", series_name = "M.USD.EUR.SP00.E",
  startPeriod = "2017-05", endPeriod = "2018-04"
)

## Request the three last values of the US Dollar monthly exchange rates in Euro with
## all metadata in English
w_data(dataset_name = "EXR", series_name = "M.USD.EUR.SP00.E", lastNObs = 3, language = "en")

## Use wildcards : request all available monthly exchange rates in Euro
## (at least one dimension must be specified)
w_data(dataset_name = "EXR", series_name = "M.*.EUR.SP00.E")

## Request more than one serie
w_data("EXR", series_name = "D.DKK.EUR.SP00.A+D.GBP.EUR.SP00.A+M.USD.EUR.SP00.A+M.USD.EUR.SP00.E")

## Request all series of a dataset
w_data("CPP")

## Access metadata of the US Dollar monthly exchange rates
df <- w_data(dataset_name = "EXR", series_name = "M.USD.EUR.SP00.E")
meta <- w_meta(df)

## Your client ID can be entered as a parameter as follows or saved
## in a global variable named "webstat_client_ID" in order to reuse it.
w_data("CPP", client_ID = "1234abcd-12ab-12ab-12ab-123456abcdef")
}