Source code for ASTROMER.core.scheduler

import tensorflow as tf


[docs]class CustomSchedule(tf.keras.optimizers.schedules.LearningRateSchedule): def __init__(self, d_model, warmup_steps=4000): super(CustomSchedule, self).__init__() self.d_model = d_model self.d_model = tf.cast(self.d_model, tf.float32) self.warmup_steps = warmup_steps def __call__(self, step): step = tf.cast(step, float) arg1 = tf.math.rsqrt(step) arg2 = step * (self.warmup_steps ** -1.5) return tf.math.rsqrt(self.d_model) * tf.math.minimum(arg1, arg2)