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mean()
std()
exp(x) -> e^x



### julia notes

ref: http://julia.readthedocs.org/en/latest/manual/noteworthy-differences/
ref: http://sveme.org/julia-for-matlab-users-i.html

use maximum() instead of max().
doesn't return multiple values like matlab. use 'findmax' instead.

anonymous function syntax:

    find(x-> x > 2, [1,2,3,4,5])

unpack using parens (tuples?), not brackets

writedlm, readdlm instead of dlmwrite, dlmread
read/write instead of save/load?

some built-ins like {sum, prod, max} are deep, not shallow like in matlab.