[GRASS-user] Help with HANTS

Hello grass-hopers!!
I would like some help with HANTS add-on, supplied with 7.1 version (r.hants). Reading the manual I saw that it is possible to assign weights for each maps when input is a text file. However no examples of this particular use is supplied.
Can I use another map to assign these weights?
Does anyone know how to use this feature? How does this feature affect the algorithm?
Thanks a lot for any info about this matter.

Leonardo