idz_frm(n, w, x)

In contrast to idz_sfrm , this routine works best when the length of the transformed vector is the power-of-two integer output by idz_frmi , or when the length is not specified but instead determined a posteriori from the output. The returned transformed vector is randomly permuted.

paramn

Greatest power-of-two integer satisfying :None:None:`n <= x.size` as obtained from idz_frmi ; :None:None:`n` is also the length of the output vector.

typen

int

paramw

Initialization array constructed by idz_frmi .

typew

numpy.ndarray

paramx

Vector to be transformed.

typex

numpy.ndarray

return

Transformed vector.

rtype

numpy.ndarray

Transform complex vector via a composition of Rokhlin's random transform, random subselection, and an FFT.

Examples

See :

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GitHub : /scipy/linalg/_interpolative_backend.py#890
type: <class 'function'>
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