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# neural-forecast
s
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Hi @Ada Puślecka. You can define your own custom metric, but there are some requirements. We recently refactored the losses and created a
BasePointLoss
to facilitate adding more losses. Here is the
MSE
loss based on the new class.
Your loss needs to have the init and call methods, and support using a
mask
. Let me know if you have particular doubts on how to create your loss.