testFunOptimization2d function

2D test problem for RCEIM

A two-dimensional problem for testing optimization methods.

This function was created for demonstrating the RCEIM package. It has the form:

testFunOptimization2d(x)

Arguments

• x: a vector with the point where the function is computed.

Returns

The value of the function at the requested point (x_1, x_2).

Author(s)

Alberto Krone-Martins

See Also

testFunOptimization

Examples

# Create a graphical representation of the problem with a contour plot
dev.new()
xx <- seq(-10,10,by=0.1)
yy <- seq(-10,10,by=0.1)
zz <- matrix(nrow=length(yy), ncol=length(xx))
for(i in 1:length(xx)){
        for(j in 1:length(yy)){
                zz[i,j] <- testFunOptimization2d( c(xx[i],yy[j]) )
        }
}
image(xx,yy,zz, col=gray((50:100)/100), xlab="x", ylab="y")
contour(xx,yy,zz, add=TRUE)
rm(list=c('xx','yy','zz'))