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2007 Oct 17
3
Observations on SVD linpack errors, and a workaround
...nybody wants to play with it. That matrix is 132 x 10270 entries and the file is over 10Mb. As I write this, it seems to be giving firefox a very bad time loading it. So proceed with caution (if at all) to the file badx in the web page stat.stanford.edu/~owen/ There is also a smaller one, called badx2 which illustrates the much rarer case where a skinny matrix makes svd choke, while its wide transpose causes no trouble. Also badx2 did not make firefox hang so it might be a safer one to look at. For now my workaround is to write a wrapper that first tries svd(x). If that fails it then tries svd...