I have a problem when I try to separate the components of a multidimensional function. Example:
Given the 2D function of a 2D argument: f(x) = [sqrt(x[1]), 2*x[2]] I want to split it into two separate functions which are the components of the original 2D function. I thought that the obvious solution was: f1(x) = f(x)[1] f2(x) = f(x)[2] The second function merely doubles the second component of its argument, as it should: f2([2, 3]) --> 6.0 But the functions don't turn out to be completely decoupled: let's see what happens when we do f2([-2, 3]) --> ERROR: DomainError in f2 at none:1 Even though the second function doesn't do sqrt and doesn't even depend on the first component of the argument, the first component of the original function is still checked and obviously returns an error. How do I decouple a 2D function?
