[Scilab-users] Inconsistency in polynomial coefficient order?

[Federico Miyara]

Dear all,

I'm somewhat puzzled by what appears to be an inconsistency in 
polynomial coefficient order.

Consider the polynomial

A = 1 + 2*x + 3*x^2;

If I want to create it using poly I must write

A = poly([1 2 3], 'x', 'coeff');

But if I want to use it as the denominator of a filter (whose numerator 
we can call B) I must write

y = filter(B, [3 2 1], x);

Is there a reason for this?

Regards,

Federico Miyara


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