jax.numpy.frexp¶
-
jax.numpy.
frexp
(x)[source]¶ Decompose the elements of x into mantissa and twos exponent.
LAX-backend implementation of
frexp()
. Original docstring below.frexp(x[, out1, out2], / [, out=(None, None)], *, where=True, casting=’same_kind’, order=’K’, dtype=None, subok=True[, signature, extobj])
Returns (mantissa, exponent), where x = mantissa * 2**exponent`. The mantissa is lies in the open interval(-1, 1), while the twos exponent is a signed integer.
- Returns
mantissa (ndarray) – Floating values between -1 and 1. This is a scalar if x is a scalar.
exponent (ndarray) – Integer exponents of 2. This is a scalar if x is a scalar.
See also
ldexp()
Compute
y = x1 * 2**x2
, the inverse of frexp.
Notes
Complex dtypes are not supported, they will raise a TypeError.
Examples
>>> x = np.arange(9) >>> y1, y2 = np.frexp(x) >>> y1 array([ 0. , 0.5 , 0.5 , 0.75 , 0.5 , 0.625, 0.75 , 0.875, 0.5 ]) >>> y2 array([0, 1, 2, 2, 3, 3, 3, 3, 4]) >>> y1 * 2**y2 array([ 0., 1., 2., 3., 4., 5., 6., 7., 8.])