tfb_absolute_value | R Documentation |
Y = g(X) = Abs(X)
, element-wiseThis non-injective bijector allows for transformations of scalar distributions
with the absolute value function, which maps (-inf, inf)
to [0, inf)
.
For y
in (0, inf)
, tfb_absolute_value$inverse(y)
returns the set inverse
{x in (-inf, inf) : |x| = y}
as a tuple, -y, y
.
tfb_absolute_value$inverse(0)
returns 0, 0
, which is not the set inverse
(the set inverse is the singleton {0}
), but "works" in conjunction with
TransformedDistribution
to produce a left semi-continuous pdf.
For y < 0
, tfb_absolute_value$inverse(y)
happily returns the wrong thing, -y, y
This is done for efficiency. If validate_args == TRUE
, y < 0
will raise an exception.
tfb_absolute_value(validate_args = FALSE, name = "absolute_value")
validate_args |
Logical, default FALSE. Whether to validate input with asserts. If validate_args is FALSE, and the inputs are invalid, correct behavior is not guaranteed. |
name |
name prefixed to Ops created by this class. |
a bijector instance.
For usage examples see tfb_forward()
, tfb_inverse()
, tfb_inverse_log_det_jacobian()
.
Other bijectors:
tfb_affine_linear_operator()
,
tfb_affine_scalar()
,
tfb_affine()
,
tfb_ascending()
,
tfb_batch_normalization()
,
tfb_blockwise()
,
tfb_chain()
,
tfb_cholesky_outer_product()
,
tfb_cholesky_to_inv_cholesky()
,
tfb_correlation_cholesky()
,
tfb_cumsum()
,
tfb_discrete_cosine_transform()
,
tfb_expm1()
,
tfb_exp()
,
tfb_ffjord()
,
tfb_fill_scale_tri_l()
,
tfb_fill_triangular()
,
tfb_glow()
,
tfb_gompertz_cdf()
,
tfb_gumbel_cdf()
,
tfb_gumbel()
,
tfb_identity()
,
tfb_inline()
,
tfb_invert()
,
tfb_iterated_sigmoid_centered()
,
tfb_kumaraswamy_cdf()
,
tfb_kumaraswamy()
,
tfb_lambert_w_tail()
,
tfb_masked_autoregressive_default_template()
,
tfb_masked_autoregressive_flow()
,
tfb_masked_dense()
,
tfb_matrix_inverse_tri_l()
,
tfb_matvec_lu()
,
tfb_normal_cdf()
,
tfb_ordered()
,
tfb_pad()
,
tfb_permute()
,
tfb_power_transform()
,
tfb_rational_quadratic_spline()
,
tfb_rayleigh_cdf()
,
tfb_real_nvp_default_template()
,
tfb_real_nvp()
,
tfb_reciprocal()
,
tfb_reshape()
,
tfb_scale_matvec_diag()
,
tfb_scale_matvec_linear_operator()
,
tfb_scale_matvec_lu()
,
tfb_scale_matvec_tri_l()
,
tfb_scale_tri_l()
,
tfb_scale()
,
tfb_shifted_gompertz_cdf()
,
tfb_shift()
,
tfb_sigmoid()
,
tfb_sinh_arcsinh()
,
tfb_sinh()
,
tfb_softmax_centered()
,
tfb_softplus()
,
tfb_softsign()
,
tfb_split()
,
tfb_square()
,
tfb_tanh()
,
tfb_transform_diagonal()
,
tfb_transpose()
,
tfb_weibull_cdf()
,
tfb_weibull()
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