# datatable.models.Ftrl.mantissa_nbits¶

Number of mantissa bits to take into account for hashing floats. This option is read-only for a trained model.

## Parameters¶

return
int

Current mantissa_nbits value.

new_mantissa_nbits
int

New mantissa_nbits value, should be non-negative and less than or equal to 52, that is a number of mantissa bits in a C++ 64-bit double.

except
ValueError

The exception is raised when

• trying to change this option for a model that has already been trained;

• new_mantissa_nbits value is negative or larger than 52.