Is it necessary to manually specify the loss weight for data with a large difference in the number of positive and negative samples, and how to do it

[kike-0304]

Is it necessary to manually specify the loss weight for data with a large difference in the number of positive and negative samples, and how to do it

[manujosephv]

It is not necessary.. But it helps. There is a Tutorial in the documentation which shows how we can do that.