ludata {hero}

Data for f1 function from Lu et al. (2012)

Description

Data related to the f1 function in Lu et al. (2012). Define n1 = 60 and x = seq_len(n1)/n1 - 1/2/n1. Similarly, define n2 = 80 and z = seq_len(n2)/n2 - 1/2/n2. The f1 function is defined as sin(2 * pi * (x[i] - .5) ^ 3) * cos(4 * pi * z[j]), where i in seq_along(x) and j in seq_along(z). The result of this function is stored in lutruef1. Using set.seed(3) and adding rnorm(60 * 80) to lutruef1 results in lunoisyf1.

Usage

data(ludata)

Format

The sequences x and z, the lutruef1 data matrix with 60 rows and 80 columns, and the lunoisyf1 data matrix with 60 rows and 80 columns.