the precision and F1 Score of Kettle is keep nan

[Hessen525]

Hi @OdysseasKr
The precision and F1 Score of Kettle is keep nan all the time. result as following:
============ Recall: 0.0
============ Precision: nan
============ Accuracy: 0.9962920046349942
============ F1 Score: nan
============ Relative error in total energy: 0.2103923186958998
============ Mean absolute error(in Watts): 24.667154793280716

[OdysseasKr]

Hi! This usually means that the model does not predict any activations. In other words, the predicted signal is always below the power on threshold.