Load a CSV file from the European Flux Database

Description

File name is parsed to extract year, site identification and aggregation type. The file name must point to a valid European Fluxes file, in CSV format and must resolve to a valid file format name.

Usage

read_ef_file(file_name)

Arguments

Details

Year, file name and site identification are added as fields in the returned data frame as 'efreadr_year', 'efreader_file_name' and 'efreader_site_id'.

Value

a data frame as loaded from the file, added with 'efreadr_year', 'efreadr_file_name' and 'efreadr_site_id' columns, and 'efreadr_date' column for half-hourly fluxes

Note

For semi-hourly L4 aggregation (i.e. "h" aggregation in file name) the last row is reported as month 1, day 1, hour 00:00. A normal date conversion would convert this date to be the very first half-hour in January 1st of the current year whereas it should be the first half-hour of the January 1st of the following year. Therefore a class date field ('efreader_date') is added to the returned data frame holding the correct date (ie: 1st January of the following year).

Examples

file_name <- system.file("extdata", "CEIP_EC_L4_d_FABar_2015_v02.txt", package = "efreadr")
read_ef_file(file_name)

Results