Minimise() in IntervalOptimisation does not accept keyword arguments

Specific Domains Optimization (Mathematical)
1

Hello All,

I am experimenting a bit with IntervalOptimisation package, and I have run into a problem (I am a Julia noob, please excuse me if the resolution is trivial - I’ve tried to find the answer by myself but couldn’t).

When trying to pass a keyword argument (tol) to the minimise function like this:

using IntervalOptimisation
H(X) = cos(X[1]) * sin(X[2]) - X[1]/(X[2]^2 + 1)
iv = (-1…1) × (-1…1)
minimise(H, iv, tol=1e-6)

Julia says that this function does not accept keyword arguments. I have looked at the source where minimise is declared as such:

function minimise(f, X::T, tol=1e-3) where {T}

To my understanding, regular arguments are separated from keyword ones with a semicolon. I’ve tried replacing the comma after T with a semicolon and rebuilding the package, but the error message remained the same.

Any help is appreciated!

2

It is not a keyword, it is a positional argument with default value. When omited, it just uses 1e-3.

1 Like
3

As tomakluftu states, it’s a normal (positional) argument so just leave out the word tol when you call it. Do let us know how you get on with the package!

4

It works as you suggested, thank you!