These functions are standard testcase for sensitivity
analysis benchmarks: The g-function of Sobol', the function
of Ishigami and the function of Morris (see Saltelli et al. 2000,
section 2.9)
Usage
sobol.fun(X)
ishigami.fun(X)
morris.fun(X)
Arguments
X
a matrix (or data.frame) containing the input
sample.
Value
A vector of function responses.
References
A. Saltelli, K. Chan and E. M. Scott eds, 2000, Sensitivity
Analysis, Wiley.