Getting exp to work

[embg]

After a lot of work on the code, I've found that it works perfectly for my purposes when I don't include exp in the list of functions, but if I include exp I get all kinds of weird errors related to overflow. Specifically, after fixing a bunch of initial problems, I got stuck with an issue where all the models had either 0 or nan scores, which caused splitA to partition incorrectly and sortNDHelperA not to terminate its recursion. So basically I have no idea what to do.