eiadate: EIA date parsing

In eia: API Wrapper for 'US Energy Information Administration' Open Data

Description

Helper functions for manipulating and converting between regular year-month-day date strings and EIA date string notation.

Usage

eiadate_to_date(x)

date_to_eiadate(x, date_format = c("A", "Q", "M", "W", "D", "H"))

eiadate_to_date_seq(start, end, weekly = FALSE)

Arguments

x	character, EIA date string; character or date object for regular dates. See details.
date_format	EIA date format: "A", "Q", "M", "W", "D", "H". These stand for annual, quarterly, monthly, weekly, daily, hourly. See details.
start	start EIA date or date.
end	end EIA date or date.
weekly	logical. See details.

Details

There is no reason to mix EIA date formats in this context. Functions that take EIA date strings expect a consistent format. Also, EIA date formats are parsed automatically from the dates themselves. However, daily and weekly use the same format. Too avoid ambiguity in eia_date_seq, daily is assumed; set weekly = TRUE to treat as weekly.

When providing a real date or date string, such as to date_to_eiadate, dates should be in yyyy-mm-dd format, or at least any format that can be parsed by lubridate::ymd or lubridate::ymd_hms for dates and hourly date times, respectively.

"HL" is not a supported date format. Use "H". The API does not translate the date and time when using "HL" anyhow; it simply appends the date string with the number of hours time difference.

Examples

eiadate_to_date(c("201803", "201804"))

date_to_eiadate("2018-05-14", "A")
date_to_eiadate("2018-05-14", "Q")
date_to_eiadate("2018-05-14", "M")

(x <- eiadate_to_date_seq("2018Q1", "2018Q4"))
date_to_eiadate(x, "Q")

(x <- eiadate_to_date("20190102T16Z"))
date_to_eiadate(x, "H")
(x <- eiadate_to_date_seq("20190102T16Z", "20190102T19Z"))
date_to_eiadate(x, "H")

eia documentation built on Feb. 22, 2021, 9:09 a.m.