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tf.random_normal_initializer

TensorFlow 1 version View source on GitHub

Initializer that generates tensors with a normal distribution.

Inherits From: Initializer

tf.random_normal_initializer(
    mean=0.0, stddev=0.05, seed=None
)

Used in the notebooks

Used in the guide Used in the tutorials

Initializers allow you to pre-specify an initialization strategy, encoded in the Initializer object, without knowing the shape and dtype of the variable being initialized.

Examples:

def make_variables(k, initializer): 
  return (tf.Variable(initializer(shape=[k], dtype=tf.float32)), 
          tf.Variable(initializer(shape=[k, k], dtype=tf.float32))) 
v1, v2 = make_variables(3, 
                        tf.random_normal_initializer(mean=1., stddev=2.)) 
v1 
<tf.Variable ... shape=(3,) ... numpy=array([...], dtype=float32)> 
v2 
<tf.Variable ... shape=(3, 3) ... numpy= 
 
make_variables(4, tf.random_uniform_initializer(minval=-1., maxval=1.)) 
(<tf.Variable...shape=(4,) dtype=float32...>, <tf.Variable...shape=(4, 4) ... 

Args:

  • mean: a python scalar or a scalar tensor. Mean of the random values to generate.
  • stddev: a python scalar or a scalar tensor. Standard deviation of the random values to generate.
  • seed: A Python integer. Used to create random seeds. See tf.random.set_seed for behavior.

Methods

__call__

View source

__call__(
    shape, dtype=tf.dtypes.float32
)

Returns a tensor object initialized as specified by the initializer.

Args:

  • shape: Shape of the tensor.
  • dtype: Optional dtype of the tensor. Only floating point types are supported.

Raises:

  • ValueError: If the dtype is not floating point

from_config

View source

@classmethod
from_config(
    cls, config
)

Instantiates an initializer from a configuration dictionary.

Example:

initializer = RandomUniform(-1, 1)
config = initializer.get_config()
initializer = RandomUniform.from_config(config)

Args:

  • config: A Python dictionary. It will typically be the output of get_config.

Returns:

An Initializer instance.

get_config

View source

get_config()

Returns the configuration of the initializer as a JSON-serializable dict.

Returns:

A JSON-serializable Python dict.