How can Plot in Matlab by exported data in maple?

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salim 2024-12-17

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2172223-how-can-plot-in-matlab-by-exported-data-in-maple

评论： salim 2024-12-20

采纳的回答： Walter Roberson

ST1.txt

i have a matrix data from maple but How i can get 2D-3D-plots this of this data?

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Answer 1

Walter Roberson 2024-12-17

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https://ww2.mathworks.cn/matlabcentral/answers/2172223-how-can-plot-in-matlab-by-exported-data-in-maple#answer_1555917

data = load('ST1.txt');
core = reshape(data(:, 3),100,100).';
subplot(3,1,1)
surf(real(core),'edgecolor', 'none')
subplot(3,1,2)
surf(imag(core),'edgecolor', 'none')
subplot(3,1,3)
surf(abs(core),'edgecolor', 'none')

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salim 2024-12-20

在 MATLAB Online 中打开

@Walter Roberson I’ve been working on a MATLAB project for over a month, but I’m stuck on a problem with plotting. Despite seeking help from various experts, I haven’t found a solution. The current graph doesn’t convey sufficient detail or meet the standards for publication in a high-impact journal.

A friend helped me by writing some code, but I need further improvements and fixes to achieve a professional and detailed result. Since you seem skilled in MATLAB, I hope you can assist me in refining the plot to make it publication-ready.

% Parameters
n = 1;
A = 1;                % Amplitude
B = 1;                % Width parameter of soliton
v = 1;                % Velocity of soliton
alpha = 1;            % Nonlinearity parameter
beta = 0.1;           % Dispersion parameter
gamma = 0.05;         % Noise intensity for multiplicative noise
% Grid for xi and time
xi = linspace(-20, 20, 2000);   % Spatial range in transformed coordinates
t = linspace(-20, 20, 2000);       % Time range
dt = t(2) - t(1);              % Time step
% Generate Wiener process (increments) for time
W = cumsum(sqrt(dt) * randn(size(t))); % Wiener process for each time step
W = gamma * W; % Scale Wiener process by gamma
% Define initial soliton profile (deterministic solution)
u_deterministic = abs(((tanh(0.192e3 ./ 0.35e2 .* t' + xi) - 0.1e1) .^ (0.1e1 ./ 0.4e1)) .* exp(i * (-0.3e1 .* xi - 0.8e1 * t' + (3 .* W' ))));
% Ensure u_deterministic has the correct dimensions (time x space)
if size(u_deterministic, 1) ~= length(t) || size(u_deterministic, 2) ~= length(xi)
    error('Mismatch in dimensions of u_deterministic. Check calculations.');
end
% Initialize storage for the stochastic solution
u_stochastic = zeros(length(t), length(xi));
noise=zeros(size(u_stochastic));
% Time evolution
for n = 1:length(t)
    % Apply the Wiener noise factor at time step n
    noise_factor = 1 + W(n);
    noise(n,:)=noise_factor;
    
    % Update solution with multiplicative noise
    u_stochastic(n, :) = u_deterministic(n, :) * noise_factor;
end
% Plot the 3D surface of the stochastic Kudryashov soliton
figure;
surfc(xi, t, u_deterministic, 'EdgeColor', 'none');
title('Deterministic (Wiener Process)');
xlabel('Transformed Space (\xi)');
ylabel('Time (t)');
zlabel('Amplitude (u)');
colormap jet;
figure
surfc(xi, t, noise, 'EdgeColor', 'none');
title('Multiplicative Noise (Wiener Process)');
xlabel('Transformed Space (\xi)');
ylabel('Time (t)');
zlabel('Amplitude (u)');
colormap jet;
figure
surfc(xi, t, u_stochastic, 'EdgeColor', 'none');
title('Stochastic (Wiener Process)');
xlabel('Transformed Space (\xi)');
ylabel('Time (t)');
zlabel('Amplitude (u)');
colormap jet;
figure
surfc(xi, t, u_stochastic, 'EdgeColor', 'none');
title('Stochastic (Wiener Process)');
xlabel('Transformed Space (\xi)');
ylabel('Time (t)');
zlabel('Amplitude (u)');
colormap jet;
xlim([0 20])
ylim([-5 1])
zlim([-1 2])

i solved this problem which contain stochastic but i don't have expreince in stochastic this is my first time i faced to such problem

Below is my solution. As you can see, the Wiener process appears in the PDE soliton solution. I’ve treated all variables as constants except for delta and w(t), where w(t) represents a random Wiener process. The key parameter is delta. When δ=0, there is no noise in the system, but as delta increases, the noise becomes more pronounced. My goal is to demonstrate how changes in delta affect the behavior of the function.

alos countour of graph must be like this which show all part of noise

Additionally, this is another paper that demonstrates the effect of delta and includes a 3D graph showing the same behavior that you referenced. That’s the entire concept I wanted to convey.

In the top picture, ϵ corresponds to δ in our function. As ϵ (or delta) increases, the noise also increases. I want to highlight this effect. If you have any questions, I’ll be here to answer them. Thank you for your valuable work!

Walter Roberson 2024-12-20

Sorry, I do not know anything about publication-ready plots.

salim 2024-12-20

@Walter Roberson Thanks.

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How can Plot in Matlab by exported data in maple?

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How can Plot in Matlab by exported data in maple?

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