sosfilt (Signal Processing Toolbox)

Second-order (biquadratic) IIR digital filtering

Syntax

```
y = sosfilt(sos,x)
```

Description

y = sosfilt(sos,x) applies the second-order section digital filter sos to the vector x. The output, y, is the same length as x.

sos represents the second-order section digital filter H(z)

by an L-by-6 matrix containing the coefficients of each second-order section in its rows.

If x is a matrix, sosfilt applies the filter to each column of x independently. Output y is a matrix of the same size, containing the filtered data corresponding to each column of x.

See Also

filter, medfilt1, sgolayfilt

References

[1] Orfanidis, S.J., Introduction to Signal Processing, Prentice-Hall, Englewood Cliffs, NJ, 1996.

sos2zp specgram