Glenn Jocher d1107ca4cb
ultralytics 8.0.97 confusion matrix, windows, docs updates (#2511)
Co-authored-by: Yonghye Kwon <developer.0hye@gmail.com>
Co-authored-by: Dowon <ks2515@naver.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Laughing <61612323+Laughing-q@users.noreply.github.com>
2023-05-09 21:20:34 +02:00

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---
description: Learn how to use Ultralytics YOLO's built-in callbacks `on_pretrain_routine_start` and `on_train_epoch_end` for improved training performance.
---
# on_pretrain_routine_start
---
:::ultralytics.yolo.utils.callbacks.wb.on_pretrain_routine_start
<br><br>
# on_fit_epoch_end
---
:::ultralytics.yolo.utils.callbacks.wb.on_fit_epoch_end
<br><br>
# on_train_epoch_end
---
:::ultralytics.yolo.utils.callbacks.wb.on_train_epoch_end
<br><br>
# on_train_end
---
:::ultralytics.yolo.utils.callbacks.wb.on_train_end
<br><br>