The function hamon
computes PET using the Hamon method.
hamon(x)# S4 method for Raster
hamon(x)
# S4 method for character
hamon(x)
# S4 method for data.table
hamon(x)
RasterBrick or data.table of PET values (mm/day)
Raster* object, character file path, or data.table (see details)
For Raster input, provide a raster object or file path for average temperature. For `data.table` input, provide a table with columns: "lon", "lat", "date", and "tavg".