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# ML FF W1 MB

ML_FF_W1_MB = [real]
Default: ML_FF_W1_MB = 0.5

Description: This tag defines the weight for the radial (and angular) descriptor within the machine learning force field method.

The weight for the angular descriptor ${\displaystyle W_{2}}$ is internally derived from the weight of the radial descriptor ${\displaystyle W_{1}}$ as:

${\displaystyle W_{2}=1.0-W_{1}.}$

By default this descriptor is used together with the angular descriptor with equal weights. If the weight of either becomes 0 then the internal routines for that descriptor are mostly skipped.