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this code wont work due to the surf, please edit it

this code wont work due to the surf, please edit it

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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this code wont work due to the surf, please edit it

Parameters

c = 0.5; 
n = 101;
L = 1;
 
Discretization
dx = L/(n-1);
dt = 0.5*dx^2/c;
 
Initial conditions
y = zeros(n,1);
y(1) = 100;
y(n) = 100;
 
Time-stepping loop
for t = dt:dt:1
Calculate second derivative of y excluding boundaries
yxx = (y(3:n)-2*y(2:n-1)+y(1:n-2))/dx^2;
y(2:n-1) = y(2:n-1) + c*dt*yxx;
end
 
Meshgrid for 3D plot including boundary points
[X, T] = meshgrid(dx:dx:L-dx, 0:dt:1);
 
Reshape solution for 3D plot
Y = y(2:n-1);
Y = repmat(Y,1,size(T,2));
 
 
surf(X, T, Y);
xlabel('x');
ylabel('t');
zlabel('y');
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