search for: yfile

I''m a fairly visual person, and I have a piece of paper with many boxes and arrows with labels like "has many" and "belongs to" for my database models. It''s messy, but it works. What I keep looking for--weeks, actually, I''m certain it''s out there, but I haven''t hit on the right set of Google query terms :)--is something that will

I frequently use Makefiles to manage routine data manipulations and repeated analyses where the "raw" data tend to change with time. With S/Splus, this has worked quite naturally, as long as I'm careful to use S object names that map directly to Unix/Linux filenames. For example, say I'm building a particular graphic (chart.ps) from a data.frame in S (mydata) that comes from an