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Creates a vector from a (batch of) triangular matrix.
tf.contrib.distributions.fill_triangular_inverse(
x, upper=False, name=None
)
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
|
Python bool representing whether output matrix should be upper
triangular (True ) or lower triangular (False , default).
|
name
|
Python str . The name to give this op.
|
Returns | |
---|---|
flat_tril
|
(Batch of) vector-shaped Tensor representing vectorized lower
(or upper) triangular elements from x .
|