tf.contrib.distributions.fill_triangular_inverse(
x,
upper=False,
name=None
)
Defined in tensorflow/python/ops/distributions/util.py
.
Creates a vector from a (batch of) triangular matrix.
The vector is created from the lower-triangular or upper-triangular portion
depending on the value of the parameter upper
.
If x.shape
is [b1, b2, ..., bB, n, n]
then the output shape is
[b1, b2, ..., bB, d]
where d = n (n + 1) / 2
.
Example:
fill_triangular_inverse(
[[4, 0, 0],
[6, 5, 0],
[3, 2, 1]])
# ==> [1, 2, 3, 4, 5, 6]
fill_triangular_inverse(
[[1, 2, 3],
[0, 5, 6],
[0, 0, 4]], upper=True)
# ==> [1, 2, 3, 4, 5, 6]
Args:
x
:Tensor
representing lower (or upper) triangular elements.upper
: Pythonbool
representing whether output matrix should be upper triangular (True
) or lower triangular (False
, default).name
: Pythonstr
. The name to give this op.
Returns:
flat_tril
: (Batch of) vector-shapedTensor
representing vectorized lower (or upper) triangular elements fromx
.