poly :: Characteristic Polynomial

octave_polynomial_poly

Function: p = poly ( A )

p: the row vector of coefficients of det ( sI-A )

function p = octave_polynomial_poly( A )

 p = poly( A );
 ZERO = roots( p );
 ZERO_MAX = max( ZERO );
 ZERO_MIN = min( ZERO );

 X = linspace ( ZERO_MIN, ZERO_MAX, 100 );
 Y = polyval ( p, X );
 plot( X, Y )

endfunction

octave_polynomial_poly.m

octave_polynomial_poly