array
        The stabilized polynomial.

    Examples
    --------
    Convert a linear-phase filter into a minimum-phase filter with the same
    magnitude response.
    &gt;&gt;&gt; h = fir1(25,0.4);               # Window-based FIR filter design
    &gt;&gt;&gt; flag_linphase = islinphase(h)   # Determines if filter is linear phase
    &gt;&gt;&gt; hmin = polystab(h) * norm(h)/norm(polystab(h));
    &gt;&gt;&gt; flag_minphase = isminphase(hmin)# Determines if filter is min phase

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