ploting 1D eigenvector using ffmatlib
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I want to know is there any way to plot 1d eigenvector in MATLAB.
I am exporting the matrices from freefem++ and solving them for eigen value using eigs in MATLAB
I want to plot eigenvectors using ffdeplot but apparently all the functions in ffmatlib library is for 2D or 3D problem
回答（1 个）
AKennedy
2025-2-4
Yes, you can plot a 1D eigenvector in MATLAB. Since the eigenvector is 1D, you can simply use the “plot” function to visualize it. Here are two examples you may refer to,
- The eigenvector is plotted directly, where the index of each element is automatically used for the x-axis with markers (‘*’) connected by lines (‘-’).
% Generate a 1D eigenvector
eigenvector = [1; 2; 3; 4; 5];
% Plot the eigenvector
plot(eigenvector,'*-')
2. We explicitly create x-axis values using the “length” function and plot the eigenvector as a line plot, with markers ('o') connected by lines ('-').
% Example 1D eigenvector
eigenvector = [0.2, 0.5, 0.8, 0.9, 1.0, 0.9, 0.8, 0.5, 0.2];
% Create x-axis values
x = 1:length(eigenvector);
% Plot eigenvector as a line plot
plot(x, eigenvector, 'o-'); % 'o-' for markers and lines
xlabel('Index');
ylabel('Eigenvector Value');
title('1D Eigenvector Plot');
grid on;
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