Source code for gpflow.likelihoods.utils

# Copyright 2017-2020 The GPflow Contributors. All Rights Reserved.
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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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# http://www.apache.org/licenses/LICENSE-2.0
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import numpy as np
import tensorflow as tf

from ..experimental.check_shapes import check_shapes


[docs]@check_shapes( "x: [batch...]", "return: [batch...]", ) def inv_probit(x: tf.Tensor) -> tf.Tensor: jitter = 1e-3 # ensures output is strictly between 0 and 1 return 0.5 * (1.0 + tf.math.erf(x / np.sqrt(2.0))) * (1 - 2 * jitter) + jitter