( sqrt(sum(squares)/length))
can be more efficient.
weights
in the sqrt(sum(squares/weights))
depend on the state of the solution.
LoadError: LoadError: LoadError: type Array has no field x
in anonymous at /home/travis/.julia/v0.4/ODE/src/tests/test_cases.jl:68
in call at /home/travis/.julia/v0.4/ODE/src/base.jl:84
in include at ./boot.jl:261
in include_from_node1 at ./loading.jl:320
in include at ./boot.jl:261
in include_from_node1 at ./loading.jl:320
in require at ./loading.jl:259
in eval at /home/travis/.julia/v0.4/DifferentialEquations/src/DifferentialEquations.jl:3
in init_package at /home/travis/.julia/v0.4/DifferentialEquations/src/general/backends.jl:23
in init_package at /home/travis/.julia/v0.4/DifferentialEquations/src/general/backends.jl:16
in initialize_backend at /home/travis/.julia/v0.4/DifferentialEquations/src/general/backends.jl:5
in solve at /home/travis/.julia/v0.4/DifferentialEquations/src/ode/ode_solve.jl:230