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rewrite the polynomial coefficients

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Jimmy
Jimmy el 29 de Mzo. de 2015
Comentada: Jimmy el 7 de Abr. de 2015
H =
1e-08 s
-------------------------------------------------
s^4 - 0.0002 s^3 - 3.002 s^2 + 2.001 s + 0.001001
i want the polynomial in the denominator to end with +1 instead of +0.001001. is there any easy way to do this with a function?
  3 comentarios
John D'Errico
John D'Errico el 29 de Mzo. de 2015
Editada: John D'Errico el 29 de Mzo. de 2015
More correctly, that would be 999.000999000999..., not 1000.
Star Strider
Star Strider el 29 de Mzo. de 2015
I stand corrected!

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Radha Krishna Maddukuri
Radha Krishna Maddukuri el 7 de Abr. de 2015
Hi Jimmy,
You have to divide the numerator and denominator by the last element in the denominator. The easiest way would be to get the last element using den(end). The end argument will give you the last element in the row irrespective of the length of the array.
>> num = [1e-8 0];
>> den = [1 -0.0002 -3.002 +2.001 +0.001001];
>> poly= tf(num,den);
>> den_new = den/den(end);
>> num_new = num/den(end);
>> poly_new = tf(num_new,den_new);

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