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cell2sos

Convert cell array to second-order-section matrix

Syntax

• s = cell2sos(c)
  [s,g] = cell2sos(c)
  

Description

s = cell2sos(c) converts cell array c of the form

•       c = { {b1,a1}, {b2,a2}, ... {bi,ai} }
  

where each numerator vector bi and denominator vector ai contains the coefficients of a linear or quadratic polynomial, to an L-by-6 second-order section matrix s of the form

• s = [b1 a1
          b2 a2
          ...
          bi ai]
  

When cell2sos encounters linear sections, it zero-pads the sections on the right.

[s,g] = cell2sos(c) when the first element of c is a pair of scalars, forms the scalar gain g with the first pair and uses the remaining elements of c to build the s matrix.

Examples

• c = {{[0.0181 0.0181],[1.0000 -0.5095]},{[1 2 1],[1 -1.2505  
  0.5457]}}
  
  c = 
  {1x2 cell}    {1x2 cell}
  
  s = cell2sos(c)
  s =
  
      0.0181    0.0181         0    1.0000   -0.5095         0
      1.0000    2.0000    1.0000    1.0000   -1.2505    0.5457 
  

See Also
sos2ss, sos2tf, sos2zp, ss2sos, tf2sos, zp2sos

ca2tf

cicdecimate