plotSurface2D

Convenient wrapper for plotting a contour plot of a real
function of two variables.

internal

Implementation of statistical methods for the estimation of
toroidal diffusions. Several diffusive models are provided, most of them
belonging to the Langevin family of diffusions on the torus. Specifically,
the wrapped normal and von Mises processes are included, which can be seen
as toroidal analogues of the Ornstein-Uhlenbeck diffusion. A collection of
methods for approximate maximum likelihood estimation, organized in four
blocks, is given: (i) based on the exact transition probability density,
obtained as the numerical solution to the Fokker-Plank equation; (ii) based
on wrapped pseudo-likelihoods; (iii) based on specific analytic
approximations by wrapped processes; (iv) based on maximum likelihood of
the stationary densities. The package allows the replicability of the
results in García-Portugués et al. (2019) <doi:10.1007/s11222-017-9790-2>.

Eduardo Portugues

sdetorus

Statistical Tools for Toroidal Diffusions

Eduardo García-Portugués

plotSurface2D function

<dl><dt>x, y</dt>
<dd>numerical grids fore each dimension. They must be in ascending
order.</dd>
<dt>f</dt>
<dd>function to be plot. Must take a single argument (see examples).</dd>
<dt>z</dt>
<dd>a vector of length <code>length(x) * length(y)</code> containing the
evaluation of <code>f</code> in the bivariate grid. If not provided, it is
computed internally.</dd>
<dt>nLev</dt>
<dd>the number of levels the range of <code>z</code> will be divided into.</dd>
<dt>levels</dt>
<dd>vector of contour levels. If not provided, it is set to
<code>quantile(z, probs = seq(0, 1, l = nLev))</code>.</dd>
<dt>fVect</dt>
<dd>flag to indicate whether <code>f</code> is a vectorized function
(see examples).</dd>
<dt>...</dt>
<dd>further arguments passed to <code><a href="/link/image?package=sdetorus&version=0.1.10" data-mini-rdoc="sdetorus::image">image</a></code></dd></dl>

Arguments

Contour plot of a 2D surface — plotSurface2D

<dl>

<dt>x, y</dt>
<dd>numerical grids fore each dimension. They must be in ascending
order.</dd>


<dt>f</dt>
<dd>function to be plot. Must take a single argument (see examples).</dd>


<dt>z</dt>
<dd>a vector of length <code>length(x) * length(y)</code> containing the
evaluation of <code>f</code> in the bivariate grid. If not provided, it is
computed internally.</dd>


<dt>nLev</dt>
<dd>the number of levels the range of <code>z</code> will be divided into.</dd>


<dt>levels</dt>
<dd>vector of contour levels. If not provided, it is set to
<code>quantile(z, probs = seq(0, 1, l = nLev))</code>.</dd>


<dt>fVect</dt>
<dd>flag to indicate whether <code>f</code> is a vectorized function
(see examples).</dd>


<dt>...</dt>
<dd>further arguments passed to <code><a href='https://rdrr.io/r/graphics/image.html'>image</a></code></dd>

</dl>

plotSurface2D: Contour plot of a 2D surface

Description

Usage

Value

Arguments

Examples