cplxmap issue when trying to plot z^(1/3)

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I am trying to plot z^(1/3) using cplxmap. However, whenever I run my code, I recieve the following errors that are occuring in the function cplxmap:
Error using mesh (line 79)
Z must be a matrix, not a scalar or vector
Error in cplxmap (line 31)
mesh(x,y,m*s,blue*s);
Error in paper (line 16)
cplxmap(z, w)
The code I am running is:
clear all
close all
r = linspace(0, 1, 1000); % radius vector
theta = linspace(0, 2*pi, 1000); % angle vector
z = r.*exp(1i*theta); % defines cplxgrid
x = real(z); % real z
y = imag(z); % imaginary z
w = z.^(1/3); % w = z^(1/3)
u = real(w); % real w
v = imag(w); % imaginary w
figure(1);
cplxmap(z, w)
colormap(jet)
  3 Comments
chadi cream
chadi cream on 26 Aug 2016
Edited: chadi cream on 26 Aug 2016
you can
z=cplxgrid(10); w=z.^(1/3); cplxmap(z, w)
Caba
Caba on 10 Aug 2017
You have to create a meshgrid (matrix) from the two column vectors, r and theta. Reduce the number of elements from 1000 to something more manageable, e.g. 51. Try different values in R=linspace(0,1,M), like M=21,51,101
R = linspace(0, 1, 51); % radius vector Theta = linspace(0, 2*pi, 51); % angle vector [r,theta] = meshgrid(R,Theta); % creating a meshgrid

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Accepted Answer

Star Strider
Star Strider on 4 Oct 2014
A bit further down in the documentation for that example, it mentions cplxroot. See if:
cplxroot(3)
does what you want. If you want to generate your own plot, in that example ‘z’ is generated by the cplxgrid function.

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