Returns a tidy data.frame from a single NetCDF file, optionally subsetting a single longitudinal band
ncfile_to_df.RdReturns a tidy data.frame from a single NetCDF file, optionally subsetting a single longitudinal band
ncfile_to_df(filnam, ilon = NA, varnam, lonnam, latnam, timenam, fgetdate)Arguments
- filnam
file name
- ilon
An integer specifying an individual longitude index to subset. If provided, ilon overrides that the function extracts data for all longitude indices. If omitted (the default:
ilon = NA), the function returns tidy data for all longitude indices.- varnam
The variable name(s) for which data is to be read from the NetCDF file.
- lonnam
The dimension name of longitude in the NetCDF file.
- latnam
The dimension name of latitude in the NetCDF file.
- timenam
The name of dimension variable used for time in the NetCDF file.
- fgetdate
A function to derive the date(s) used for the time dimension based on the file name.
Value
Tidy tibble containing the variables 'varnam'. Tibble contains columns 'lon' (double), 'lat' (double), and a nested column 'data'. Column 'data' contains requested variables (probably as doubles) and might contain a column 'datetime' (as string). Note that the datetime is defined by package CFtime and can contain dates such as "2021-02-30 12:00:00", which are valid for 360-day calendars but not for POSIXt. Because of that these dates need to be parsed separately.