dayOfYear

Function gives a day number of the year (julian day of the year) based on the date in class 'Date'.

Package provides functions to calculate daily solar
        radiation at horizontal surface using several well-known
        models. It also includes functions for model calibration based
        on groud-truth data as well as a function for auto-calibration.
        The FAO Penmann-Monteith equation to calculate
        evapotranspiration is also included.

dayOfYear: Convert 'Date' to number of day in a year

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Examples