Hadfield, Jarrod
2004-Jan-28 13:13 UTC
[R] detecting non-singular square sub-matrices in rectangular matrice s.
Dear All, I was wondering whether anyone knew of an efficient way of testing whether a non-singular square sub matrix of dimensions p X p exists within a rectangular matrix of dimensions p x m. Typically, p will be about 4, and m several thousand so an exhaustive test of all possible sub matrices would be prohibitive when dealing with a large number of rectangular matrices. Thanks for any suggestions, Jarrod.