[[,Xfgpm-method

Refit a <code>fgpm</code> model as described in a <code>Xfgpm</code> object.

Construction and smart selection of Gaussian process models
for analysis of computer experiments
with emphasis on treatment of functional inputs that are regularly sampled. This package
offers: (i) flexible modeling of functional-input regression
problems through the fairly general Gaussian process model; (ii)
built-in dimension reduction for functional inputs; (iii)
heuristic optimization of the structural parameters of the model
(e.g., active inputs, kernel function, type of distance).
An in-depth tutorial in the use of funGp is provided in
Betancourt et al. (2024) <doi:10.18637/jss.v109.i05> and
Metamodeling background is provided in
Betancourt et al. (2020) <doi:10.1016/j.ress.2020.106870>.
The algorithm for structural parameter optimization is described
in <https://hal.science/hal-02532713>.

Jose Betancourt

funGp

Gaussian Process Models for Scalar and Functional Inputs

François Bachoc

Thierry Klein

Jeremy Rohmer

Yves Deville

Deborah Idier

[[,Xfgpm-method function

<dl><dt>x</dt>
<dd>A <code>Xfgpm</code> object.</dd>
<dt>i</dt>
<dd>An integer giving the index of the model to refit. The
models are in decreasing fit quality as assessed by the
Leave-One-Out \(Q^2\).</dd></dl>

Arguments

While the syntax may suggest that the function
 extracts a fitted <code>fgpm</code> model, this not true. The
 <code>fgpm</code> model is refitted using the call that was used
 when this model was assessed. The refitted <code>fgpm</code> model
 keeps the same structural parameters as the one assessed
 (active variables, kernel, ...), but since the optimization
 uses random initial values, the optimized hyper-parameters may
 differ from those of the corresponding <code>fgpm</code> in the
 <code>Xfgpm</code> object <code>x</code>. As a result, the model can be
 different and show a different LOO performance.

Caution

Refit a fgpm model in a Xfgpm object — [[,Xfgpm-method

<dl>

<dt>x</dt>
<dd>A <code>Xfgpm</code> object.</dd>


<dt>i</dt>
<dd>An integer giving the index of the model to refit. The
models are in decreasing fit quality as assessed by the
Leave-One-Out \(Q^2\).</dd>

</dl>

[[,Xfgpm-method: Refit a `fgpm` model in a `Xfgpm` object

Description

Usage

Arguments

Caution

See Also

Examples