You are passing in the initial condition `start` as an integer, but ode23 needs this to be a float. Change it to `const start = 3.0` and you are golden. This does feel like a bug you should file an issue at the github page.
On Sunday, June 19, 2016 at 11:49:55 AM UTC-7, Joungmin Lee wrote: > > Hi, > > I am making simple examples of the ODE package in Julia, but I cannot make > a code without error for 1st order ODE. > > Here is my code: > > using ODE; >> >> function f(t, y) >> x = y >> >> dx_dt = (2-x)/5 >> >> dx_dt >> end >> >> const start = 3; >> time = 0:0.1:30; >> >> t, y = ode23(f, start, time); >> > > It finally gives: > LoadError: InexactError() > while loading In[14], in expression starting on line 1 > > in copy! at abstractarray.jl:310 > in setindex! at array.jl:313 > in oderk_adapt at C:\Users\user\.julia\v0.4\ODE\src\runge_kutta.jl:279 > in oderk_adapt at C:\Users\user\.julia\v0.4\ODE\src\runge_kutta.jl:220 > in ode23 at C:\Users\user\.julia\v0.4\ODE\src\runge_kutta.jl:210 > > The example of 2nd order ODE at the GitHub works fine. > > How should I edit the code? >
