extract_date_from_filepath: Extract date from filepath
In pegoraro/qchlorophyll: qchlorophyll

Description Usage Arguments Details Value

This function extracts a date from a full path to a file. The date is assumed to be in the name of the file.

1 2	extract_date_from_filepath(path, date_format = "ymd", date_match_position = 1)

`path`	path to file. Character
`date_format`	Date format. Should match a lubridate standard format. Character
`date_match_position`	See notes above.

Assumptions: 1. Date is in the name of the file. 2. Date is in the following format: dddddddd where d is an integer. 3. Date is the first 8 digits matched in the filename. Optionally you can set this to be the ith match by setting the match_position parameter to i. See notes below.

Example: path = "/home/user/data/file1_20150202_312314342_20150802.nc" date_format = "ymd" Returns "20150202"

Notes: 1. Note that the function by default returns the first 8 digits sequence it encounters in the filename (starting left to right). The argument match_position can be used to access other dates. For instance match_position = 2 matches the second date (or, better, 8 digits sequence) it finds. 2. Note that date format can be set (should it vary). 3. If the date_format is not correct a NA is returned

an object of class Date.

pegoraro/qchlorophyll documentation built on May 24, 2019, 11:46 p.m.