Signal Processing Toolbox™

sosfilt - Second-order (biquadratic) IIR digital filtering

Syntax

y = sosfilt(sos,x)
y = sosfilt(sos,x,dim)

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. The output y is a matrix of the same size, containing the filtered data corresponding to each column of x.

If x is a multidimensional array, sosfilt filters along the first nonsingleton dimension. The output y is a multidimensional array of the same size as x, containing the filtered data corresponding to each row and column of x

y = sosfilt(sos,x,dim) operates along the dimension dim.

References

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

See Also

filter, medfilt1, sgolayfilt

sos2zp

spectrogram