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bundles / scipy 1.17.1 / scipy / signal / _filter_design / buttap

function

scipy.signal._filter_design:buttap

source: /scipy/signal/_filter_design.py :4658

Signature

def   buttap ( N ,  * ,  xp = None ,  device = None )

Summary

Return (z,p,k) for analog prototype of Nth-order Butterworth filter.

Extended Summary

The filter will have an angular (e.g., rad/s) cutoff frequency of 1.

Parameters

N : int

The order of the filter

xp : array_namespace, optional

Optional array namespace. Should be compatible with the array API standard, or supported by array-api-compat. Default: numpy

device: any

optional device specification for output. Should match one of the supported device specification in xp.

Returns

z : ndarray[float64]

Zeros of the transfer function. Is always an empty array.

p : ndarray[complex128]

Poles of the transfer function.

k : float

Gain of the transfer function.

Notes

Array API Standard Support

buttap has experimental support for Python Array API Standard compatible backends in addition to NumPy. Please consider testing these features by setting an environment variable SCIPY_ARRAY_API=1 and providing CuPy, PyTorch, JAX, or Dask arrays as array arguments. The following combinations of backend and device (or other capability) are supported.

====================  ====================  ====================
Library               CPU                   GPU
====================  ====================  ====================
NumPy                 ✅                     n/a                 
CuPy                  n/a                   ✅                   
PyTorch               ✅                     ✅                   
JAX                   ✅                     ✅                   
Dask                  ✅                     n/a                 
====================  ====================  ====================

See dev-arrayapi for more information.

See also

butter

Filter design function using this prototype

Aliases

  • scipy.signal.buttap

Referenced by

This package