Nathan Pavlovic

Apparent discrepency between code and documentation for fractional bias and fractional error

2

The [documentation](https://github.com/USEPA/AMET/blob/1.5/docs/modelperformancestatisticsdefinitions_AMET.pdf) states that the numerator and denominator should be summed separately to calculate fractional bias and error.  However, the code for DomainStats in AQ_Misc_Functions.R appears to calculate these...