Description Usage Arguments Value References Examples

View source: R/bastos_ohagan_09.R

A toy model for the demonstration of Gaussian process validation plots and statistics. It is a product of a rational function in x[1] and an exponential function in x[2]. The function is smoother in x[2] than x[1]. The function's domain is the unit square.

1 | ```
bo09_toy(x)
``` |

`x` |
A vector of length 2. |

A scalar.

Bastos, L. S., & O'Hagan, A. (2009). Diagnostics for gaussian process emulators. Technometrics, 51(4), 425–438, <doi:10.1198/TECH.2009.08019>.

1 2 3 4 5 6 7 | ```
print(bo09_toy(c(0.5,0.25)))
n <- 100
a <- seq(0,1,length.out = n)
x <- expand.grid(a,a)
z <- matrix(apply(x,1,bo09_toy),n,n)
graphics::contour(a,a,z, xlab = expression(x[1]), ylab = expression(x[2]))
``` |

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