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function [Num,Den,AllpassNum,AllpassDen] = iirlp2mb(varargin)
B = varargin(1)
A = varargin(2)
Wo = varargin(3)
Wt = varargin(4)
rhs = argn(2)
lhs = argn(1)
if(rhs < 4 | rhs > 5)
error("Wrong number of input arguments.")
end
if(rhs == 5)
Pass = varargin(5);
if(Pass == 'pass')
pass_stop = -1
elseif(Pass == 'stop')
pass_stop = 1
else
error("Pass must be pass or stop.")
end
else
pass_stop = -1
end
if(Wo <= 0)
error("Wo is <= 0.")
end
if(Wo >= 1)
error("Wo is >= 1.");
end
oWt = 0;
for i = 1 : length(Wt)
if(Wt(i) <= 0)
error("Wt is <= 0.");
end
if(Wt(i) >= 1)
error("Wt is >= 1.");
end
if(Wt(i) <= oWt)
error("Wt not monotonically increasing.");
else
oWt = Wt(i);
end
end
endfunction
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