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Classification Trees and basic Random Forest pkg using tree structures in C

Izmirlian, Grant (NIH/NCI) wrote:
<snipped>
Hi,

Hmm, why didn't you just post a URL? Incidentally I am actually very
interested in seeing your code. I am working on a project where
the data set is extremely large, but the permuntation of the states of
the data is extremely small. Each piece of data consists of only 4 
states, so stuffing it as an R object (which takes up 32-byte? on
32-bit machines) or even an char vector is quite wasteful; so I
have written a "strange" data.frame where internally it uses only
2-bit for storage. (it is still work-in-process but I have got to
the point of being able to get and set each 2-bit cell now).

Hin-Tak Leung