Roger Hui wrote: > The methods I suggested work for square and non-square > (tall, not wide) matrices. > > lii=: 1:@%. ::0:
Fair enough. I had forgotten that monadic %. works for non-square matrices, although I am familiar with its dyadic use. Is there a simple way to calculate rank using this method? My J-only solutions all involve something like reduced row echelon form, using the script libraries. I suspect the interpreter does a better job. Best wishes, John ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
