surface plotting.surface plot poroblem. Please I want help. An error appears when running

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T K 2022-12-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1873452-surface-plotting-surface-plot-poroblem-please-i-want-help-an-error-appears-when-running

评论： T K 2022-12-10

Please I want help. An error appears when running #code

w = 1; k=1; figure tspan = linspace(0, 5); % Create Constant ‘tspan’ zv=0.1:0.01:0.5; % Vector Of ‘z’ Values gs2 = zeros(numel(tspan), numel(zv)); % Preallocate for k = 1:numel(zv) z = zv(k); f = @(t,x) [-1i.*(2*w + 2*z).*x(1) + -1i.*sqrt(2).*k.*x(2);-1i.*sqrt(2).*k.*x(1) + -1i.*2*w*x(2)+-1i.*sqrt(2).*k.*x(3);-1i.*sqrt(2).*k.*x(2)+-1i.*2*w*x(3)]; [t,xa] = ode45(f,tspan,[0 1 0]); gs = abs(xa).^2; gs2(:,k) = gs(:,2); % Save Second Column Of ‘gs’ In ‘gs2’ Matrix end

figure surf(t,zv,gs2') grid on xlabel('t') ylabel('z') shading('interp')

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Walter Roberson 2022-12-7

You changed your code after I answered your question :(

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Answer 1

Walter Roberson 2022-12-7

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1873452-surface-plotting-surface-plot-poroblem-please-i-want-help-an-error-appears-when-running#answer_1122747

在 MATLAB Online 中打开

w = 1;

k=1;

figure

tspan = linspace(0, 5); %must be a vector of length 3 or more

zvals = 0.1:0.01:0.5;

numt = length(tspan);

numz = length(zvals);

gs = zeros(numt, 3, numz);

for zidx = 1 : numz

z = zvals(zidx);

f = @(t,x) [-1i.*(2*w + 2*z).*x(1) + -1i.*sqrt(2).*k.*x(2);-1i.*sqrt(2).*k.*x(1) + -1i.*2*w*x(2)+-1i.*sqrt(2).*k.*x(3);-1i.*sqrt(2).*k.*x(2)+-1i.*2*w*x(3)];

[t,xa] = ode45(f,tspan,[0 1 0]);

gs(:,:,zidx) = abs(xa).^2;

end

G = squeeze(gs(:,2,:)) .';

surf(t,zvals,G)