scipy.signal.symiirorder1

scipy.signal.symiirorder1(input, c0, z1, precision=- 1.0)

Implement a smoothing IIR filter with mirror-symmetric boundary conditions using a cascade of first-order sections. The second section uses a reversed sequence. This implements a system with the following transfer function and mirror-symmetric boundary conditions:

                c0              
H(z) = ---------------------    
        (1-z1/z) (1 - z1 z)     

The resulting signal will have mirror symmetric boundary conditions as well.

Parameters

inputndarray

The input signal.

c0, z1scalar

Parameters in the transfer function.

precision :

Specifies the precision for calculating initial conditions of the recursive filter based on mirror-symmetric input.

Returns

outputndarray

The filtered signal.