extractdays: Extracts the rows of a matrix corresponding to the requested days (expressed as dates YYYY-MM-DD) given the date (origin) of the first row
Description
Extracts the rows of a matrix corresponding to the requested days (expressed as dates YYYY-MM-DD) given the date (origin) of the first row
Usage
extractdays(
data = array(1:ndim_max, dim = c(ndim_max, 1)),
ndim_max = 1e+05,
when = "1990-1-1",
origin = "1961-1-1",
nday = 1
)
Value
a matrix containing the requested rows
Arguments
- data
an input data matrix where each row corresponds to a daily record
- ndim_max
maximum (integer) number of rows in data where to find when.
Default is 100000 and works if data is missing.
- when
desired dates for which the data are requested
- origin
date corresponding to the first row of data
- nday
(optional) number of days since when to extract the data