matlab里eigs的代码使用例子

Sure, here's an example of how to use the eigs function in MATLAB:

Let's say you have a matrix A that you want to find the top-k eigenvalues and eigenvectors for. You can use the eigs function like this:

k = 5; % number of eigenvalues/vectors to find
opts.tol = 1e-6; % set tolerance for convergence
[V,D] = eigs(A,k,'largestabs',opts); % compute top-k eigenvalues/eigenvectors

This will give you the k largest (in absolute value) eigenvalues and corresponding eigenvectors of matrix A. The output V will be a matrix with k columns representing the eigenvectors, and D will be a diagonal matrix with the k eigenvalues on the diagonal.