read_fmi_cum: Read daily cummulated solar spectrum data file(s).
Description
Read one or more cumulated daily spectral irradiance file as output by Anders
Lindors' model based on libRadTrans. Dates are read from the file header and
parsed with the function suplied as date.f.
Either a path to a file, a connection, or literal data (either a
single string or a raw vector).
date
a POSIXct object to use to set the "when.measured"
attribute. If NULL, the default, the date is extracted from the
file header.
geocode
A data frame with columns lon and lat used to
set attribute "where.measured".
label
character string, but if NULL the value of file is
used, and if NA the "what.measured" attribute is not set.
tz
character Time zone used for interpreting times saved in the file
header.
locale
The locale controls defaults that vary from place to place. The
default locale is US-centric (like R), but you can use
locale to create your own locale that controls things
like the default time zone, encoding, decimal mark, big mark, and day/month
names.
.skip
Number of lines to skip before reading data---i.e. the number of
rows in the header.
.n_max
Maximum number of records to read.
.date.f
A function for extracting a date-time from the file header
passed as charecter sring to its first argument and which returns a
POSIXct object.
files
list or vector of paths each one with the same requirements as
described for argument file.
Value
read_fmi_cum() returns a source_spct object with
time.unit attribute set to "day" and when.measured
attribute set to the date-time extracted from the header at the top of
the read file.
read_m_fmi_cum returns a source_mspct containing one
source_spct object for each one of the multiple files read.