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1. [S] rank of a matrix with SVD is good? (score: 1): Author: Agin.Patrick@hydro.qc.ca; Date: Fri, 29 Sep 2000 11:58:43 -0400; Hi everyone, Is the Singular Value Decomposition a good way to calculate the rank of a square matrix? I have the following problem: my matrix X (10x10) seems to be singular and thus not invertible. Y; /archives/html/s-news/2000-09/msg00198.html (8,621 bytes)
2. RE: [S] rank of a matrix with SVD is good? (score: 1): Author: "Bishop, Lane" <lane.bishop@honeywell.com>; Date: Fri, 29 Sep 2000 09:56:29 -0700; I suspect your "matrix" X may really be a datasheet or something that doesn't really have exact matrix attributes. The same thing happen to me when I imported your data as a datasheet. This worked: s; /archives/html/s-news/2000-09/msg00199.html (9,753 bytes)
3. RE: [S] rank of a matrix with SVD is good? (score: 1): Author: Agin.Patrick@hydro.qc.ca; Date: Fri, 29 Sep 2000 13:14:02 -0400; Thank you to Fernando Quintana, Bruce Mcullough, Lane Bishop and Bill You were right, the matrix is invertible and solve(as.matrix(X)) does the work. Bill, I use Splus 4.5 and data.class(X) and class; /archives/html/s-news/2000-09/msg00200.html (11,063 bytes)

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