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function phasor(modulus, argument)
% Wrapper for quiver() that plots phasor diagrams.
%
% Expects the modulus and argument (in degrees)
% of a complex number.
r = modulus;
phi = argument * pi / 180;
% Automatic scaling is disabled.
quiver(0, 0, r*cos(phi), r*sin(phi), 0);
xlim([-r r]);
ylim([-r r]);
end
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