Description Usage Arguments Value References Examples
Standardized precipitation-evapotranspiration index calculated at 1-month time scale
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| eto | evapotranspiration, mm | 
| pr | daily precipitation, mm | 
| data_names | names of each period of time | 
| na.rm | logical. Should missing values (including NaN) be removed? | 
| ... | further arguments passed to or from other methods | 
index value
Vicente-Serrano, S. M., Beguería, S. and López-Moreno, J. I.: A multiscalar drought index sensitive to global warming: The standardized precipitation evapotranspiration index, J. Clim., 23(7), doi: 10.1175/2009JCLI2909.1, 2010.
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