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Add example for LR scheduler #28152

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merged 4 commits into from May 8, 2019
Merged

Add example for LR scheduler #28152

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0c41783
Add example for LR scheduler
aweers Apr 25, 2019
1662bdc
Rephrase a commentand delete one
aweers Apr 26, 2019
8deca6b
Removed unneccessary sentence
aweers Apr 28, 2019
cd1481f
Lines fit line limit now
aweers May 3, 2019
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14 changes: 14 additions & 0 deletions tensorflow/python/keras/callbacks.py
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Expand Up @@ -1168,6 +1168,20 @@ class LearningRateScheduler(Callback):
(integer, indexed from 0) and returns a new
learning rate as output (float).
verbose: int. 0: quiet, 1: update messages.

```python
# This function keeps the learning rate at 0.001 for the first ten epochs
# and decreases it exponentially after that.
def scheduler(epoch):
if epoch < 10:
return 0.001
else:
return 0.001 * tf.math.exp(0.1 * (10 - epoch))

callback = tf.keras.callbacks.LearningRateScheduler(scheduler)
model.fit(data, labels, epochs=100, callbacks=[callback],
validation_data=(val_data, val_labels))
```
"""

def __init__(self, schedule, verbose=0):
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