W&B log epoch (#1946)

* W&B log epoch

* capitalize

* W&B log epoch

* capitalize

* Update train.py

New try using https://docs.wandb.ai/library/log#incremental-logging

* Update train.py

* Update test.py

* Update train.py

* Update plots.py

* Update train.py

* Update train.py

* label plot step -1

* update

* update

* update

* update

* update

* update

* Update train.py

* Update train.py

utils/plots.py

@@ -295,7 +295,7 @@ def plot_labels(labels, save_dir=Path(''), loggers=None):
     # loggers
     for k, v in loggers.items() or {}:
         if k == 'wandb' and v:
-            v.log({"Labels": [v.Image(str(x), caption=x.name) for x in save_dir.glob('*labels*.jpg')]})
+            v.log({"Labels": [v.Image(str(x), caption=x.name) for x in save_dir.glob('*labels*.jpg')]}, commit=False)
 
 
 def plot_evolution(yaml_file='data/hyp.finetune.yaml'):  # from utils.plots import *; plot_evolution()