svd(X,'econ') matlab
时间: 2024-01-29 22:04:17 浏览: 124
The 'econ' option in the svd() function in MATLAB performs economy-sized singular value decomposition on the input matrix X. This means that instead of computing the full SVD of X, which would result in matrices of size m x m, n x n, and m x n, where X is of size m x n, the 'econ' option only computes the necessary parts of the SVD, resulting in matrices of size m x k, k x k, and k x n, where k is the rank of X, i.e., the number of non-zero singular values. This can be more efficient in terms of memory and computation time when dealing with large matrices.