repeated numbers in roots

Hi

can anybody tell how to remove repeated number in roots of polynomial eqaution.

w =

0.2278

0.2278

1.0382

1.0382

1.5292

1.5292

0.1738

0.1738

0.3461

0.3461

0.5647

0.5647

0.8437

0.8437

0.9098

0.9098

1.0873

1.0873

1.2007

1.2007

Answer 1

[KSSV]

iwant = unique(w)

[Ali]

To find roots of w is

w=roots(w);

r-roots(w);

which is one better and accurate way??

[KSSV]

Use roots. See to it that the coefficients of the polynomials are arranged as required for the function.