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.