Frost days index per time period

Let infile be a time series of the daily minimum temperature TN, then the number of days where TN < 0 °C is counted. Note that TN have to be given in units of Kelvin. Parameter is a comma-separated list of "key=value" pairs.

Usage

cdo_eca_fd(ifile, freq = NULL, ofile = NULL)

cdo_etccdi_fd(ifile, freq = NULL, ofile = NULL)

Arguments

ifile

String with the path to the input file.

freq

STRING - Output frequency (year, month)

ofile

String with the path to the output file.

Value

Operators that output one or more files return a character vector to the output files.

Operators that output an indefinite number of files return a string with the basename of the files.

Operatos that don't return filenames return a character vector with the string output.

Details

eca_fd     Frost days index per time period
           The operator counts over the entire time series.
           The date information of a timestep in outfile is the date of
           the last contributing timestep in infile.
etccdi_fd  Frost days index per time period
           The default output frequency is yearly.
           The date information of a timestep in outfile is the mid of
           the frequency interval.