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Please note that the recommended version of Scilab is 2025.0.0. This page might be outdated.
See the recommended documentation of this function
filter
filters a data sequence using a digital filter
Calling Sequence
[y,zf] = filter(num,den,x [,zi])
Arguments
- num
real vector : the coefficients of the filter numerator in decreasing power order, or a polynomial.
- den
real vector : the coefficients of the filter denominator in decreasing power order, or a polynomial.
- x
real row vector : the input signal
- zi
real row vector of length
max(length(a),length(b))-1: the initial condition relative to a "direct form II transposed" state space representation. The default value is a vector filled with zeros.- y
real row vector : the filtered signal.
- zf
real row vector : the final state. It can be used to filter a next batch of the input signal.
Description
This function filters a data sequence using a digital filter using a "direct form II transposed" implementation
References
Oppenheim, A. V. and R.W. Schafer. Discrete-Time Signal Processing, Englewood Cliffs, NJ: Prentice-Hall, 1989, pp. 311-312.
Authors
- Serge Steer, INRIA
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