STK_EXAMPLE_KB10  Leave-one-out (LOO) cross validation

 This example demonstrate the use of Leave-one-out (LOO) cross-validation to
 produced goodness-of-fit graphical diagnostics.

 The dataset comes from the "borehole model" response function, evaluated
 without noise on a space-filling design of size 10 * DIM = 80.  It is analyzed
 using a Gaussian process prior with unknown constant mean (with a uniform
 prior) and anisotropic stationary Matern covariance function (regularity 5/2;
 variance and range parameters estimated by restricted maximum likelihood).

 See also stk_predict_leaveoneout, stk_plot_predvsobs, stk_plot_histnormres