f0.schwefel4: f0.schwefel4
Description
The schwefel function of N variables for testing optimization
methods. The global optima for the function is given by
xi = 420.96874636, forall i E 1...N, f(x) = 0. The range of xi is [-500,500]
Usage
f0.schwefel4(x1, x2, x3, x4)
Arguments
x1
The first function variable
x2
The second function variable
x3
The third function variable
x4
The fourth function variable