tf.reduce_mean
2018-02-04 17:38
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reduce_mean( input_tensor, axis=None, keepdims=None, name=None, reduction_indices=None, keep_dims=None )
Defined in
tensorflow/python/ops/math_ops.py.
See the guide:
Math > Reduction
Computes the mean of elements across dimensions of a tensor. (deprecated arguments)
SOME ARGUMENTS ARE DEPRECATED. They will be removed in a future version.Instructions for updating:keep_dims is deprecated, use keepdims instead
Reduces
input_tensoralong the dimensions given in
axis.Unless
keepdimsis true, the rank of the tensor is reduced by 1 for eachentry in
axis. If
keepdimsis true, the reduced dimensionsare retained with length 1.
If
axishas no entries, all dimensions are reduced, and atensor with a single element is returned.
For example:
x = tf.constant([[1., 1.], [2., 2.]]) tf.reduce_mean(x) # 1.5 tf.reduce_mean(x, 0) # [1.5, 1.5] tf.reduce_mean(x, 1) # [1., 2.]
Args:
input_tensor: The tensor to reduce. Should have numeric type.
axis: The dimensions to reduce. If
None(the default), reduces all dimensions. Must be in the range
[-rank(input_tensor), rank(input_tensor)).
keepdims: If true, retains reduced dimensions with length 1.
name: A name for the operation (optional).
reduction_indices: The old (deprecated) name for axis.
keep_dims: Deprecated alias for
keepdims.
Returns:
The reduced tensor.Numpy Compatibility
Equivalent to np.meanPlease note that
np.meanhas a
dtypeparameter that could be used tospecify the output type. By default this is
dtype=float64. On the otherhand,
tf.reduce_meanhas an aggressive type inference from
input_tensor,for example:
x = tf.constant([1, 0, 1, 0]) tf.reduce_mean(x) # 0 y = tf.constant([1., 0., 1., 0.]) tf.reduce_mean(y) # 0.5
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上次更新日期:一月 27, 2018
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