On Sat, Oct 3, 2009 at 7:44 AM, Sean Owen <[email protected]> wrote: > Is the idea of 'labels' a key feature it would be missing? again a > wrapper strategy can probably take care of that, not clear how hard it > is. >
Labels are the only thing that scares me. It may be that we really need to figure out a good answer to that in any case so that labels as an idea can be separated from matrices. The real problem is that matrix operations should be by label rather than index. If we can somehow make the indexes universal, then we should be OK. One way to do that is to broaden the idea of conformability in matrices to require that the were created using a common label dictionary for the conformable indexes. Another issue is that some matrices are essentially unbounded (or we do not know the bounds). These matrices must by nature be sparse. This comes up in situations such as a document x term matrix where we do not know how many terms there may be, nor how many documents. > What are people's inclinations on this? > Try an experiment? -- Ted Dunning, CTO DeepDyve
