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How to make a Riemann surface plot of simple analytic functions ?

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Ole on 28 Sep 2017
Edited: Ole on 29 Sep 2017
How to make a riemann surface plot of simple analytic functions ? The code below does not give the correct plots.
clear all; close all; clc;
x = linspace(-2,2,100);
y = linspace(-2,2,100);
[X, Y] = meshgrid(x,y);
z = X + 1i*Y;
f = sin(z); %log(z) %sqrt(z)
p = surfc(real(z),imag(z),angle(f));
%p = surfc(real(z),imag(z),cos(X).*sinh(Y));
view(3), axis equal
Also the following does not give the branches.
z = cplxgrid(30);
Sin(z) should look like sin(z)

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