GP: Bayesian modelling using Gaussian processes. The 'gp' programs implement Bayesian models for regression and classification tasks that are based on Gaussian process priors over functions. For details, see the thesis, Evaluation of Gaussian Process and Other Methods for Non-linear Regression, by Carl Edward Rasmussen, Dept. of Computer Science, University of Toronto. A Gaussian process specifies a distribution over functions from some number of inputs to some number of real outputs. (For the Gaussian processes implemented here, the functions for different outputs are independent.) In the Bayesian models based on these Gaussian processes, the functions in question are used to define a model for the target attributes in training and test cases given the values of nthe input attributes in these cases. The Gaussian process gives the prior distribution over these functions. A Gaussian process is specified by giving its covariance function, which is expressed in terms of "hyperparameters", which are themselves given prior distributions. (The means for the Gaussian processes implemented here are always zero.) To see how the form of the covariance function and the priors for the hyperparameters are specified, see gp-spec.doc. The models based on these Gaussian processes are described using a general scheme that is also used for neural network models, see model-spec.doc for details. Survival models are not allowed. Copyright (c) 1996 by Radford M. Neal