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See the recommended documentation of this function

Aide Scilab >> Traitement du Signal > filter

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.

See Also

  • flts — time response (discrete time, sampled system)
  • rtitr — discrete time response (transfer matrix)
  • ltitr — discrete time response (state space)

Authors

  • Serge Steer, INRIA
Scilab Enterprises
Copyright (c) 2011-2017 (Scilab Enterprises)
Copyright (c) 1989-2012 (INRIA)
Copyright (c) 1989-2007 (ENPC)
with contributors
Last updated:
Wed Oct 05 12:10:56 CEST 2011