This field comparator is for numeric fields, where a given maximal
absolute difference can be tolerated. This difference has to be set by
the argument max_abs_diff
as a positive value. The default
value is , i.e. no difference is tolerated.
The agreement weight is returned if the numbers are the same, and the
disagreement weight if the absolute difference is larger than the
max_abs_diff
value. If the absolute difference between the
two values is larger than but equal to or smaller than
max_abs_diff
the partial agreement weight is calculated
according to the following formula.
In its current version no frequency dependent weight calculation is
possible, thus the arguments frequency_table
,
freq_table_max_weight
and freq_table_min_weight
can not be used with this field comparator function.