How can I plot the contour of the imaginary unit of this function phiz?

[x,y] = meshgrid(linspace(-4,4));

y = y.*1i;

for k = 1:8

z = x + 1i.*y;

phiz = z + z.^(-1) - 1i.*(k/(2*pi)).*log(z);

figure (4);

contour(x,y,imag(phiz),'-k');

end

Answer 1

[Chandra]

Hi,

Imaginary term generally indicates the axis of a graph, (2,3) can be written as 2+3i is some applications and magnitude gives the distance from origin, so if we want to see the imaginary term directly provide the real values in y axis

y = real(y);
%or we can provide magnitude
y = abs(y);

try different values to y and see the contour plot changes.

refer to contour for further information