[R] detecting non-singular square sub-matrices in rectangular matrice s.

Hadfield, Jarrod jarrod.hadfield at imperial.ac.uk
Wed Jan 28 14:13:47 CET 2004

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,


More information about the R-help mailing list