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x=[0;0.1;2];
y=[0;0.1;2];
A=rand(0,2*pi);
B=rand(0,2*pi);
L==1.5;
C=normrnd(0,1);
D==2.1;
n=linspace;
Z=sum(C*(L.^(-(3-D).^n))*sin((L.^n)*(x*cos(B)+y*sin(B))+A));
plot(x,y,z)

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??? Input argument "d1" is undefined.
Error in ==> linspace at 18
y = [d1+(0:n-2)*(d2-d1)/(floor(n)-1) d2];


function y = linspace(d1, d2, n)
%LINSPACE Linearly spaced vector.
%   LINSPACE(X1, X2) generates a row vector of 100 linearly
%   equally spaced points between X1 and X2.
%
%   LINSPACE(X1, X2, N) generates N points between X1 and X2.
%   For N < 2, LINSPACE returns X2.
%
%   See also LOGSPACE, :.
%   Copyright 1984-2002 The MathWorks, Inc.
%   $Revision: 5.12 $  $Date: 2002/02/05 13:47:28 $
if nargin == 2
n = 100;
end
y = [d1+(0:n-2)*(d2-d1)/(floor(n)-1) d2];

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