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