These are the Matlab and R-program scripts that were used to generate the HRAC-Precip_v1 data and validation shown in https://disc.gsfc.nasa.gov/datasets/HRAC_Precip_V1/summary https://disc2.gesdisc.eosdis.nasa.gov/data/LEGACY/HRAC_Precip.1/doc/README.HRAC_Precip.pdf
The data used in the coefficient production (Matlab & .mat files) are found in the 'InputData' branch.