### >> help angle ANGLE Phase angle.

>> help angle ANGLE Phase angle. ANGLE(H) returns the phase angles, in radians, of a matrix with complex elements. >> angle(0.5-1.5j)/pi ans = -0.3976. >> b=1; a=poly([1,1,-1]) a = 1 -1 -1 1 >> [R,p,c]=residuez(b,a) R = 0.25000000000000

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