orgTime: Handles the in/output date used in the filerting

In aubreyd/modis4rwrfhydro: MODIS acquisition and processing

Description

With this function you define the period to be filtered (begin:end), the output temporal resolution (nDays), and it selected from 'files' the required data.

Usage

  orgTime(files,nDays="asIn",begin=NULL,end=NULL,pillow=75,pos1=10,pos2=16,format="%Y%j")

Arguments

files	MODIS filenames, eg output of runGdal or runMrt.
nDays	Integer. Time interval for the output layers. Default is "asIn" that includes the exact input dates within the period selected using begin and end. Can also be nDays="1 month" or "1 week" see: https://www.stat.berkeley.edu/classes/s133/dates.html example of seq(from,to,by) at the bottom.
begin	Default is from earliest input dataset. Here you can supply the begin date of the output
end	Default to the end of the input dataset. Here you can specify the end date of the output (note, the exact end-date depends on start and nDays argument.
pillow	Number of days added on the beginning and on the end of a time serie.
pos1	Start position of date in the filename. You have to count, sorry!
pos2	End position of date in the filename. You have to count, sorry!
format	How is the date formatted in the file, default expects: 'YYYYDDD' ("%Y%j"). Read ?as.Date for for more information.

Value

List

Author(s)

Matteo Mattiuzzi

Examples

## Not run: 
# note, this function can be applied to any files that have a date information in the _filename_!
files <- c("MOD13A2.A2010353.1_km_16_days_composite_day_of_the_year.tif",
 "MOD13A2.A2011001.1_km_16_days_composite_day_of_the_year.tif",
 "MYD13A2.A2010361.1_km_16_days_composite_day_of_the_year.tif",
 "MYD13A2.A2011009.1_km_16_days_composite_day_of_the_year.tif")

orgTime(files)
orgTime(files,nDays=2,begin="2010350",end="2011015")

## End(Not run)

aubreyd/modis4rwrfhydro documentation built on May 10, 2019, 2:13 p.m.