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function [B,A] = sos2tf(sos, g)
//This function converts series second-order sections to direct H(z) = B(z)/A(z) form.
//Calling Sequence
//[B] = sos2tf(sos)
//[B] = sos2tf(sos, g)
//[B,A] = sos2tf(...)
//Parameters
//sos: matrix of real or complex numbers
//g: real or complex value, default value is 1
//Description
//This is an Octave function.
//This function converts series second-order sections to direct H(z) = B(z)/A(z) form.
//The input is the sos matrix and the second parameter is the overall gain, default value of which is 1.
//The output is a vector.
//Examples
//sos = [1 1 1 1 0 -1; -2 3 1 1 10 1];
////[b,a] = sos2tf(sos)
//a =
// -2 1 2 4 1
//b =
// 1 10 0 -10 -1
funcprot(0);
rhs = argn(2)
if(rhs<1 | rhs>2)
error("Wrong number of input arguments.")
end
select(rhs)
case 1 then
[B,A] = callOctave("sos2tf",sos)
case 2 then
[B,A] = callOctave("sos2tf",sos,g)
end
endfunction
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